Merge branch 'v1.0.x' into manual-upmerge

70 files changed, 233 insertions, 198 deletions

diff --git a/.gitmodules b/.gitmodules
index ce647f3c45..d41b8d5213 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,7 +4,7 @@
 [submodule "third_party/protobuf"]
 	path = third_party/protobuf
 	url = https://github.com/google/protobuf.git
-	branch = 3.0.0-beta-3
+	branch = 3.0.0-GA
 [submodule "third_party/gflags"]
 	path = third_party/gflags
 	url = https://github.com/gflags/gflags.git
diff --git a/examples/cpp/helloworld/Makefile b/examples/cpp/helloworld/Makefile
index df82f4688f..2c50b8208b 100644
--- a/examples/cpp/helloworld/Makefile
+++ b/examples/cpp/helloworld/Makefile
@@ -107,7 +107,7 @@ ifneq ($(HAS_VALID_PROTOC),true)
 	@echo "Please install Google protocol buffers 3.0.0 and its compiler."
 	@echo "You can find it here:"
 	@echo
-	@echo "   https://github.com/google/protobuf/releases/tag/v3.0.0-beta-3.3"
+	@echo "   https://github.com/google/protobuf/releases/tag/v3.0.0"
 	@echo
 	@echo "Here is what I get when trying to evaluate your version of protoc:"
 	@echo
diff --git a/examples/cpp/route_guide/Makefile b/examples/cpp/route_guide/Makefile
index ba5e45c05c..00cf9ad4e6 100644
--- a/examples/cpp/route_guide/Makefile
+++ b/examples/cpp/route_guide/Makefile
@@ -96,7 +96,7 @@ ifneq ($(HAS_VALID_PROTOC),true)
 	@echo "Please install Google protocol buffers 3.0.0 and its compiler."
 	@echo "You can find it here:"
 	@echo
-	@echo "   https://github.com/google/protobuf/releases/tag/v3.0.0-beta-3.3"
+	@echo "   https://github.com/google/protobuf/releases/tag/v3.0.0"
 	@echo
 	@echo "Here is what I get when trying to evaluate your version of protoc:"
 	@echo
diff --git a/examples/csharp/helloworld/.nuget/packages.config b/examples/csharp/helloworld/.nuget/packages.config
deleted file mode 100644
index aa060800c1..0000000000
--- a/examples/csharp/helloworld/.nuget/packages.config
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="Grpc.Tools" version="0.15.0" />
-</packages>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/Greeter.sln b/examples/csharp/helloworld/Greeter.sln
index 9430e94de9..49e364d91c 100644
--- a/examples/csharp/helloworld/Greeter.sln
+++ b/examples/csharp/helloworld/Greeter.sln
@@ -9,11 +9,6 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GreeterServer", "GreeterSer
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GreeterClient", "GreeterClient\GreeterClient.csproj", "{ACCF4597-3748-4117-8633-1CB767F8CCC3}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".nuget", ".nuget", "{FF1EBE95-F20D-4C27-8A61-D0125F3C8152}"
-	ProjectSection(SolutionItems) = preProject
-		.nuget\packages.config = .nuget\packages.config
-	EndProjectSection
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
diff --git a/examples/csharp/helloworld/Greeter/packages.config b/examples/csharp/helloworld/Greeter/packages.config
index ff9d6bbf73..c94bb87307 100644
--- a/examples/csharp/helloworld/Greeter/packages.config
+++ b/examples/csharp/helloworld/Greeter/packages.config
@@ -4,4 +4,5 @@
   <package id="Grpc" version="0.15.0" targetFramework="net45" />
   <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="Grpc.Tools" version="0.15.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/.nuget/packages.config b/examples/csharp/route_guide/.nuget/packages.config
deleted file mode 100644
index aa060800c1..0000000000
--- a/examples/csharp/route_guide/.nuget/packages.config
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="Grpc.Tools" version="0.15.0" />
-</packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/RouteGuide.sln b/examples/csharp/route_guide/RouteGuide.sln
index 0b79fdc5ca..00065b0ba9 100644
--- a/examples/csharp/route_guide/RouteGuide.sln
+++ b/examples/csharp/route_guide/RouteGuide.sln
@@ -9,11 +9,6 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RouteGuideClient", "RouteGu
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RouteGuideServer", "RouteGuideServer\RouteGuideServer.csproj", "{4B7C7794-BE24-4477-ACE7-18259EB73D27}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".nuget", ".nuget", "{2F6B184B-A576-4F21-AF2E-27E73D1FC96E}"
-	ProjectSection(SolutionItems) = preProject
-		.nuget\packages.config = .nuget\packages.config
-	EndProjectSection
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
diff --git a/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj b/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
index 601d16ba24..942d94f66c 100644
--- a/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
+++ b/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
@@ -45,15 +45,15 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj b/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
index 5bf46b05b8..4ffc5ccca9 100644
--- a/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
+++ b/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
@@ -47,15 +47,15 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
-    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
diff --git a/examples/csharp/route_guide/RouteGuideServer/packages.config b/examples/csharp/route_guide/RouteGuideServer/packages.config
index b962a7232a..916fe4c01d 100644
--- a/examples/csharp/route_guide/RouteGuideServer/packages.config
+++ b/examples/csharp/route_guide/RouteGuideServer/packages.config
@@ -5,4 +5,5 @@
   <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Grpc.Tools" version="0.15.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/objective-c/auth_sample/AuthTestService.podspec b/examples/objective-c/auth_sample/AuthTestService.podspec
index d709c7e636..afccf08bbf 100644
--- a/examples/objective-c/auth_sample/AuthTestService.podspec
+++ b/examples/objective-c/auth_sample/AuthTestService.podspec
@@ -14,7 +14,7 @@ Pod::Spec.new do |s|
   src = "../../protos"
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1.2"
 
   # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
   pods_root = 'Pods'
diff --git a/examples/objective-c/helloworld/HelloWorld.podspec b/examples/objective-c/helloworld/HelloWorld.podspec
index 48364fc0af..9f07bd6b30 100644
--- a/examples/objective-c/helloworld/HelloWorld.podspec
+++ b/examples/objective-c/helloworld/HelloWorld.podspec
@@ -14,7 +14,7 @@ Pod::Spec.new do |s|
   src = "../../protos"
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1.2"
 
   # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
   pods_root = 'Pods'
diff --git a/examples/objective-c/route_guide/RouteGuide.podspec b/examples/objective-c/route_guide/RouteGuide.podspec
index 04bc10bc0b..7e7e01d878 100644
--- a/examples/objective-c/route_guide/RouteGuide.podspec
+++ b/examples/objective-c/route_guide/RouteGuide.podspec
@@ -14,7 +14,7 @@ Pod::Spec.new do |s|
   src = "../../protos"
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1.2"
 
   # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
   pods_root = 'Pods'
diff --git a/examples/python/route_guide/route_guide_server.py b/examples/python/route_guide/route_guide_server.py
index 4e780a70a1..3ffe678476 100644
--- a/examples/python/route_guide/route_guide_server.py
+++ b/examples/python/route_guide/route_guide_server.py
@@ -68,7 +68,7 @@ def get_distance(start, end):
   R = 6371000; # metres
   return R * c;
 
-class RouteGuideServicer(route_guide_pb2.BetaRouteGuideServicer):
+class RouteGuideServicer(route_guide_pb2.RouteGuideServicer):
   """Provides methods that implement functionality of route guide server."""
 
   def __init__(self):
diff --git a/gRPC-ProtoRPC.podspec b/gRPC-ProtoRPC.podspec
index 741067b23f..f3a8343041 100644
--- a/gRPC-ProtoRPC.podspec
+++ b/gRPC-ProtoRPC.podspec
@@ -1,9 +1,3 @@
-# GRPC CocoaPods podspec
-# This file has been automatically generated from a template file.
-# Please look at the templates directory instead.
-# This file can be regenerated from the template by running
-# tools/buildgen/generate_projects.sh
-
 # Copyright 2015, Google Inc.
 # All rights reserved.
 #
@@ -61,7 +55,7 @@ Pod::Spec.new do |s|
 
   s.dependency 'gRPC', version
   s.dependency 'gRPC-RxLibrary', version
-  s.dependency 'Protobuf', '~> 3.0.0-beta-3.1'
+  s.dependency 'Protobuf', '~> 3.0'
   # This is needed by all pods that depend on Protobuf:
   s.pod_target_xcconfig = {
     'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS=1',
diff --git a/gRPC-RxLibrary.podspec b/gRPC-RxLibrary.podspec
index 862ed8974b..9936d52df5 100644
--- a/gRPC-RxLibrary.podspec
+++ b/gRPC-RxLibrary.podspec
@@ -1,9 +1,3 @@
-# GRPC CocoaPods podspec
-# This file has been automatically generated from a template file.
-# Please look at the templates directory instead.
-# This file can be regenerated from the template by running
-# tools/buildgen/generate_projects.sh
-
 # Copyright 2015, Google Inc.
 # All rights reserved.
 #
diff --git a/gRPC.podspec b/gRPC.podspec
index eda965a328..3f6da3b141 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -1,9 +1,3 @@
-# GRPC CocoaPods podspec
-# This file has been automatically generated from a template file.
-# Please look at the templates directory instead.
-# This file can be regenerated from the template by running
-# tools/buildgen/generate_projects.sh
-
 # Copyright 2015, Google Inc.
 # All rights reserved.
 #
diff --git a/include/grpc++/ext/reflection.pb.h b/include/grpc++/ext/reflection.pb.h
index 00d07735ee..bdb86197d0 100644
--- a/include/grpc++/ext/reflection.pb.h
+++ b/include/grpc++/ext/reflection.pb.h
@@ -83,7 +83,7 @@ class ServiceResponse;
 
 // ===================================================================
 
-class ServerReflectionRequest : public ::google::protobuf::Message {
+class ServerReflectionRequest : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ServerReflectionRequest) */ {
  public:
   ServerReflectionRequest();
   virtual ~ServerReflectionRequest();
@@ -126,7 +126,11 @@ class ServerReflectionRequest : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -260,7 +264,7 @@ class ServerReflectionRequest : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ExtensionRequest : public ::google::protobuf::Message {
+class ExtensionRequest : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ExtensionRequest) */ {
  public:
   ExtensionRequest();
   virtual ~ExtensionRequest();
@@ -294,7 +298,11 @@ class ExtensionRequest : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -350,7 +358,7 @@ class ExtensionRequest : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ServerReflectionResponse : public ::google::protobuf::Message {
+class ServerReflectionResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ServerReflectionResponse) */ {
  public:
   ServerReflectionResponse();
   virtual ~ServerReflectionResponse();
@@ -392,7 +400,11 @@ class ServerReflectionResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -505,7 +517,7 @@ class ServerReflectionResponse : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class FileDescriptorResponse : public ::google::protobuf::Message {
+class FileDescriptorResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.FileDescriptorResponse) */ {
  public:
   FileDescriptorResponse();
   virtual ~FileDescriptorResponse();
@@ -539,7 +551,11 @@ class FileDescriptorResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -593,7 +609,7 @@ class FileDescriptorResponse : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ExtensionNumberResponse : public ::google::protobuf::Message {
+class ExtensionNumberResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ExtensionNumberResponse) */ {
  public:
   ExtensionNumberResponse();
   virtual ~ExtensionNumberResponse();
@@ -627,7 +643,11 @@ class ExtensionNumberResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -690,7 +710,7 @@ class ExtensionNumberResponse : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ListServiceResponse : public ::google::protobuf::Message {
+class ListServiceResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ListServiceResponse) */ {
  public:
   ListServiceResponse();
   virtual ~ListServiceResponse();
@@ -724,7 +744,11 @@ class ListServiceResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -774,7 +798,7 @@ class ListServiceResponse : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ServiceResponse : public ::google::protobuf::Message {
+class ServiceResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ServiceResponse) */ {
  public:
   ServiceResponse();
   virtual ~ServiceResponse();
@@ -808,7 +832,11 @@ class ServiceResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
@@ -857,7 +885,7 @@ class ServiceResponse : public ::google::protobuf::Message {
 };
 // -------------------------------------------------------------------
 
-class ErrorResponse : public ::google::protobuf::Message {
+class ErrorResponse : public ::google::protobuf::Message /* @@protoc_insertion_point(class_definition:grpc.reflection.v1alpha.ErrorResponse) */ {
  public:
   ErrorResponse();
   virtual ~ErrorResponse();
@@ -891,7 +919,11 @@ class ErrorResponse : public ::google::protobuf::Message {
       ::google::protobuf::io::CodedInputStream* input);
   void SerializeWithCachedSizes(
       ::google::protobuf::io::CodedOutputStream* output) const;
-  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray(
+      bool deterministic, ::google::protobuf::uint8* output) const;
+  ::google::protobuf::uint8* SerializeWithCachedSizesToArray(::google::protobuf::uint8* output) const {
+    return InternalSerializeWithCachedSizesToArray(false, output);
+  }
   int GetCachedSize() const { return _cached_size_; }
   private:
   void SharedCtor();
diff --git a/requirements.txt b/requirements.txt
index 0ec0e75b76..bf87de07f8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@ coverage>=4.0
 cython>=0.23
 enum34>=1.0.4
 futures>=2.2.0
-protobuf>=3.0.0a3
+protobuf>=3.0.0
 six>=1.10
-wheel>=0.29
\ No newline at end of file
+wheel>=0.29
diff --git a/setup.py b/setup.py
index cad300c144..fb9537fccd 100644
--- a/setup.py
+++ b/setup.py
@@ -200,7 +200,7 @@ INSTALL_REQUIRES = (
     'futures>=2.2.0',
     # TODO(atash): eventually split the grpcio package into a metapackage
     # depending on protobuf and the runtime component (independent of protobuf)
-    'protobuf>=3.0.0a3',
+    'protobuf>=3.0.0',
 )
 
 SETUP_REQUIRES = INSTALL_REQUIRES + (
diff --git a/src/cpp/ext/reflection.pb.cc b/src/cpp/ext/reflection.pb.cc
index b73a65d0a0..a84494f9a9 100644
--- a/src/cpp/ext/reflection.pb.cc
+++ b/src/cpp/ext/reflection.pb.cc
@@ -98,6 +98,7 @@ const ::google::protobuf::internal::GeneratedMessageReflection*
 }  // namespace
 
 
+void protobuf_AssignDesc_reflection_2eproto() GOOGLE_ATTRIBUTE_COLD;
 void protobuf_AssignDesc_reflection_2eproto() {
   protobuf_AddDesc_reflection_2eproto();
   const ::google::protobuf::FileDescriptor* file =
@@ -253,6 +254,7 @@ inline void protobuf_AssignDescriptorsOnce() {
                  &protobuf_AssignDesc_reflection_2eproto);
 }
 
+void protobuf_RegisterTypes(const ::std::string&) GOOGLE_ATTRIBUTE_COLD;
 void protobuf_RegisterTypes(const ::std::string&) {
   protobuf_AssignDescriptorsOnce();
   ::google::protobuf::MessageFactory::InternalRegisterGeneratedMessage(
@@ -296,6 +298,7 @@ void protobuf_ShutdownFile_reflection_2eproto() {
   delete ErrorResponse_reflection_;
 }
 
+void protobuf_AddDesc_reflection_2eproto() GOOGLE_ATTRIBUTE_COLD;
 void protobuf_AddDesc_reflection_2eproto() {
   static bool already_here = false;
   if (already_here) return;
@@ -366,16 +369,6 @@ struct StaticDescriptorInitializer_reflection_2eproto {
   }
 } static_descriptor_initializer_reflection_2eproto_;
 
-namespace {
-
-static void MergeFromFail(int line) GOOGLE_ATTRIBUTE_COLD;
-static void MergeFromFail(int line) {
-  GOOGLE_CHECK(false) << __FILE__ << ":" << line;
-}
-
-}  // namespace
-
-
 // ===================================================================
 
 #if !defined(_MSC_VER) || _MSC_VER >= 1900
@@ -684,8 +677,8 @@ void ServerReflectionRequest::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServerReflectionRequest)
 }
 
-::google::protobuf::uint8* ServerReflectionRequest::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ServerReflectionRequest::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServerReflectionRequest)
   // optional string host = 1;
   if (this->host().size() > 0) {
@@ -723,8 +716,8 @@ void ServerReflectionRequest::SerializeWithCachedSizes(
   // optional .grpc.reflection.v1alpha.ExtensionRequest file_containing_extension = 5;
   if (has_file_containing_extension()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        5, *message_request_.file_containing_extension_, target);
+      InternalWriteMessageNoVirtualToArray(
+        5, *message_request_.file_containing_extension_, false, target);
   }
 
   // optional string all_extension_numbers_of_type = 6;
@@ -812,7 +805,9 @@ int ServerReflectionRequest::ByteSize() const {
 
 void ServerReflectionRequest::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ServerReflectionRequest* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ServerReflectionRequest>(
           &from);
@@ -827,7 +822,9 @@ void ServerReflectionRequest::MergeFrom(const ::google::protobuf::Message& from)
 
 void ServerReflectionRequest::MergeFrom(const ServerReflectionRequest& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServerReflectionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   switch (from.message_request_case()) {
     case kFileByFilename: {
       set_file_by_filename(from.file_by_filename());
@@ -1486,8 +1483,8 @@ void ExtensionRequest::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ExtensionRequest)
 }
 
-::google::protobuf::uint8* ExtensionRequest::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ExtensionRequest::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ExtensionRequest)
   // optional string containing_type = 1;
   if (this->containing_type().size() > 0) {
@@ -1535,7 +1532,9 @@ int ExtensionRequest::ByteSize() const {
 
 void ExtensionRequest::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ExtensionRequest* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ExtensionRequest>(
           &from);
@@ -1550,7 +1549,9 @@ void ExtensionRequest::MergeFrom(const ::google::protobuf::Message& from) {
 
 void ExtensionRequest::MergeFrom(const ExtensionRequest& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ExtensionRequest)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   if (from.containing_type().size() > 0) {
 
     containing_type_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.containing_type_);
@@ -1937,8 +1938,8 @@ void ServerReflectionResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServerReflectionResponse)
 }
 
-::google::protobuf::uint8* ServerReflectionResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ServerReflectionResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServerReflectionResponse)
   // optional string valid_host = 1;
   if (this->valid_host().size() > 0) {
@@ -1954,36 +1955,36 @@ void ServerReflectionResponse::SerializeWithCachedSizes(
   // optional .grpc.reflection.v1alpha.ServerReflectionRequest original_request = 2;
   if (this->has_original_request()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        2, *this->original_request_, target);
+      InternalWriteMessageNoVirtualToArray(
+        2, *this->original_request_, false, target);
   }
 
   // optional .grpc.reflection.v1alpha.FileDescriptorResponse file_descriptor_response = 4;
   if (has_file_descriptor_response()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        4, *message_response_.file_descriptor_response_, target);
+      InternalWriteMessageNoVirtualToArray(
+        4, *message_response_.file_descriptor_response_, false, target);
   }
 
   // optional .grpc.reflection.v1alpha.ExtensionNumberResponse all_extension_numbers_response = 5;
   if (has_all_extension_numbers_response()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        5, *message_response_.all_extension_numbers_response_, target);
+      InternalWriteMessageNoVirtualToArray(
+        5, *message_response_.all_extension_numbers_response_, false, target);
   }
 
   // optional .grpc.reflection.v1alpha.ListServiceResponse list_services_response = 6;
   if (has_list_services_response()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        6, *message_response_.list_services_response_, target);
+      InternalWriteMessageNoVirtualToArray(
+        6, *message_response_.list_services_response_, false, target);
   }
 
   // optional .grpc.reflection.v1alpha.ErrorResponse error_response = 7;
   if (has_error_response()) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        7, *message_response_.error_response_, target);
+      InternalWriteMessageNoVirtualToArray(
+        7, *message_response_.error_response_, false, target);
   }
 
   // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ServerReflectionResponse)
@@ -2049,7 +2050,9 @@ int ServerReflectionResponse::ByteSize() const {
 
 void ServerReflectionResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ServerReflectionResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ServerReflectionResponse>(
           &from);
@@ -2064,7 +2067,9 @@ void ServerReflectionResponse::MergeFrom(const ::google::protobuf::Message& from
 
 void ServerReflectionResponse::MergeFrom(const ServerReflectionResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServerReflectionResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   switch (from.message_response_case()) {
     case kFileDescriptorResponse: {
       mutable_file_descriptor_response()->::grpc::reflection::v1alpha::FileDescriptorResponse::MergeFrom(from.file_descriptor_response());
@@ -2550,8 +2555,8 @@ void FileDescriptorResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.FileDescriptorResponse)
 }
 
-::google::protobuf::uint8* FileDescriptorResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* FileDescriptorResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.FileDescriptorResponse)
   // repeated bytes file_descriptor_proto = 1;
   for (int i = 0; i < this->file_descriptor_proto_size(); i++) {
@@ -2582,7 +2587,9 @@ int FileDescriptorResponse::ByteSize() const {
 
 void FileDescriptorResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const FileDescriptorResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const FileDescriptorResponse>(
           &from);
@@ -2597,7 +2604,9 @@ void FileDescriptorResponse::MergeFrom(const ::google::protobuf::Message& from)
 
 void FileDescriptorResponse::MergeFrom(const FileDescriptorResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.FileDescriptorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   file_descriptor_proto_.MergeFrom(from.file_descriptor_proto_);
 }
 
@@ -2863,8 +2872,8 @@ void ExtensionNumberResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ExtensionNumberResponse)
 }
 
-::google::protobuf::uint8* ExtensionNumberResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ExtensionNumberResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
   // optional string base_type_name = 1;
   if (this->base_type_name().size() > 0) {
@@ -2931,7 +2940,9 @@ int ExtensionNumberResponse::ByteSize() const {
 
 void ExtensionNumberResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ExtensionNumberResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ExtensionNumberResponse>(
           &from);
@@ -2946,7 +2957,9 @@ void ExtensionNumberResponse::MergeFrom(const ::google::protobuf::Message& from)
 
 void ExtensionNumberResponse::MergeFrom(const ExtensionNumberResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ExtensionNumberResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   extension_number_.MergeFrom(from.extension_number_);
   if (from.base_type_name().size() > 0) {
 
@@ -3199,14 +3212,14 @@ void ListServiceResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ListServiceResponse)
 }
 
-::google::protobuf::uint8* ListServiceResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ListServiceResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ListServiceResponse)
   // repeated .grpc.reflection.v1alpha.ServiceResponse service = 1;
   for (unsigned int i = 0, n = this->service_size(); i < n; i++) {
     target = ::google::protobuf::internal::WireFormatLite::
-      WriteMessageNoVirtualToArray(
-        1, this->service(i), target);
+      InternalWriteMessageNoVirtualToArray(
+        1, this->service(i), false, target);
   }
 
   // @@protoc_insertion_point(serialize_to_array_end:grpc.reflection.v1alpha.ListServiceResponse)
@@ -3233,7 +3246,9 @@ int ListServiceResponse::ByteSize() const {
 
 void ListServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ListServiceResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ListServiceResponse>(
           &from);
@@ -3248,7 +3263,9 @@ void ListServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
 
 void ListServiceResponse::MergeFrom(const ListServiceResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ListServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   service_.MergeFrom(from.service_);
 }
 
@@ -3459,8 +3476,8 @@ void ServiceResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ServiceResponse)
 }
 
-::google::protobuf::uint8* ServiceResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ServiceResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ServiceResponse)
   // optional string name = 1;
   if (this->name().size() > 0) {
@@ -3496,7 +3513,9 @@ int ServiceResponse::ByteSize() const {
 
 void ServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ServiceResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ServiceResponse>(
           &from);
@@ -3511,7 +3530,9 @@ void ServiceResponse::MergeFrom(const ::google::protobuf::Message& from) {
 
 void ServiceResponse::MergeFrom(const ServiceResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ServiceResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   if (from.name().size() > 0) {
 
     name_.AssignWithDefault(&::google::protobuf::internal::GetEmptyStringAlreadyInited(), from.name_);
@@ -3762,8 +3783,8 @@ void ErrorResponse::SerializeWithCachedSizes(
   // @@protoc_insertion_point(serialize_end:grpc.reflection.v1alpha.ErrorResponse)
 }
 
-::google::protobuf::uint8* ErrorResponse::SerializeWithCachedSizesToArray(
-    ::google::protobuf::uint8* target) const {
+::google::protobuf::uint8* ErrorResponse::InternalSerializeWithCachedSizesToArray(
+    bool deterministic, ::google::protobuf::uint8* target) const {
   // @@protoc_insertion_point(serialize_to_array_start:grpc.reflection.v1alpha.ErrorResponse)
   // optional int32 error_code = 1;
   if (this->error_code() != 0) {
@@ -3811,7 +3832,9 @@ int ErrorResponse::ByteSize() const {
 
 void ErrorResponse::MergeFrom(const ::google::protobuf::Message& from) {
 // @@protoc_insertion_point(generalized_merge_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   const ErrorResponse* source = 
       ::google::protobuf::internal::DynamicCastToGenerated<const ErrorResponse>(
           &from);
@@ -3826,7 +3849,9 @@ void ErrorResponse::MergeFrom(const ::google::protobuf::Message& from) {
 
 void ErrorResponse::MergeFrom(const ErrorResponse& from) {
 // @@protoc_insertion_point(class_specific_merge_from_start:grpc.reflection.v1alpha.ErrorResponse)
-  if (GOOGLE_PREDICT_FALSE(&from == this)) MergeFromFail(__LINE__);
+  if (GOOGLE_PREDICT_FALSE(&from == this)) {
+    ::google::protobuf::internal::MergeFromFail(__FILE__, __LINE__);
+  }
   if (from.error_code() != 0) {
     set_error_code(from.error_code());
   }
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index f6c226567d..d99bf8e4e1 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -40,7 +40,7 @@
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
@@ -108,4 +108,4 @@
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
   <ItemGroup />
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.Core.Tests/packages.config b/src/csharp/Grpc.Core.Tests/packages.config
index 6a930c17ee..456ffcd8d0 100644
--- a/src/csharp/Grpc.Core.Tests/packages.config
+++ b/src/csharp/Grpc.Core.Tests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 1952ee3712..622813fb38 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -40,7 +40,7 @@
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
@@ -152,4 +152,4 @@
       <Link>roots.pem</Link>
     </EmbeddedResource>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index 543549eb2d..a8459c4d9c 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -15,7 +15,7 @@
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2</tags>
     <dependencies>
-      <dependency id="Ix-Async" version="1.2.5" />
+      <dependency id="System.Interactive.Async" version="3.0.0" />
     </dependencies>
   </metadata>
   <files>
diff --git a/src/csharp/Grpc.Core/packages.config b/src/csharp/Grpc.Core/packages.config
index 80daf048d0..6514774021 100644
--- a/src/csharp/Grpc.Core/packages.config
+++ b/src/csharp/Grpc.Core/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 901b0ce5d0..f7e21a25dd 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -31,7 +31,7 @@
     "xmlDoc": true
   },
   "dependencies": {
-    "Ix-Async": "1.2.5"
+    "System.Interactive.Async": "3.0.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index ad319478ab..764a335ddf 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Examples": {
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index ad319478ab..764a335ddf 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Examples": {
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index 4c7d89309a..c8801a9413 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -43,7 +43,7 @@
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
@@ -75,4 +75,4 @@
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index 668601af8e..cc473eb34c 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 3dfa84e896..4521649b6f 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -48,7 +48,7 @@
     <Reference Include="System.Data.Linq" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
@@ -72,4 +72,4 @@
     <None Include="Grpc.Examples.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index a70dcbd4c6..8985ae4c77 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 48ec530abb..5329f390e4 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -1,6 +1,11 @@
 {
   "buildOptions": {
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
 
   "dependencies": {
     "Grpc.Core": {
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index 7db8b2d38e..e13416cc1a 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Core" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
@@ -82,4 +82,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
index 7b3b391009..4ffd18ccb2 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
@@ -16,7 +16,7 @@
 	<dependencies>
 	  <dependency id="Google.Protobuf" version="$ProtobufVersion$" />
 	  <dependency id="Grpc.Core" version="$version$" />
-	  <dependency id="Ix-Async" version="1.2.3" />
+	  <dependency id="System.Interactive.Async" version="3.0.0" />
     </dependencies>
   </metadata>
   <files>
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index a52d9e508f..063094f775 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 287950720f..9afcb306b4 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -44,11 +44,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 287950720f..9afcb306b4 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -44,11 +44,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index 3a0764230d..7512d2a5d1 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -70,7 +70,7 @@
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System.Interactive.Async">
-      <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
+      <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
@@ -149,4 +149,4 @@
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index 3161c5b755..e6e64e6558 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -5,7 +5,7 @@
   <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
   <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index 043df06a66..51ff1da01e 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -71,6 +71,8 @@ var Metadata = require('./metadata.js');
 
 var common = require('./common.js');
 
+var _ = require('lodash');
+
 /**
  * Create an SSL Credentials object. If using a client-side certificate, both
  * the second and third arguments must be passed.
@@ -99,7 +101,7 @@ exports.createFromMetadataGenerator = function(metadata_generator) {
       var message = '';
       if (error) {
         message = error.message;
-        if (error.hasOwnProperty('code')) {
+        if (error.hasOwnProperty('code') && _.isFinite(error.code)) {
           code = error.code;
         } else {
           code = grpc.status.UNAUTHENTICATED;
diff --git a/src/node/test/credentials_test.js b/src/node/test/credentials_test.js
index 0a21572582..305843f665 100644
--- a/src/node/test/credentials_test.js
+++ b/src/node/test/credentials_test.js
@@ -71,7 +71,10 @@ var fakeSuccessfulGoogleCredentials = {
 var fakeFailingGoogleCredentials = {
   getRequestMetadata: function(service_url, callback) {
     setTimeout(function() {
-      callback(new Error('Authentication failure'));
+      // Google credentials currently adds string error codes to auth errors
+      var error = new Error('Authentication failure');
+      error.code = 'ENOENT';
+      callback(error);
     }, 0);
   }
 };
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index 97f4f586b7..07d62d2047 100644
--- a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
   # before them.
   s.name     = '!ProtoCompiler-gRPCPlugin'
   v = '1.0.0-pre1'
-  s.version  = v
+  s.version  = "#{v}.2" # .2 to depend on protoc 3.0.0
   s.summary  = 'The gRPC ProtoC plugin generates Objective-C files from .proto services.'
   s.description = <<-DESC
     This podspec only downloads the gRPC protoc plugin so that local pods generating protos can use
@@ -96,7 +96,7 @@ Pod::Spec.new do |s|
   s.preserve_paths = plugin
 
   # Restrict the protoc version to the one supported by this plugin.
-  s.dependency '!ProtoCompiler', '3.0.0-beta-3.1'
+  s.dependency '!ProtoCompiler', '3.0.0'
   # For the Protobuf dependency not to complain:
   s.ios.deployment_target = '7.1'
   s.osx.deployment_target = '10.9'
diff --git a/src/objective-c/!ProtoCompiler.podspec b/src/objective-c/!ProtoCompiler.podspec
index 56aacc3330..5018dedc06 100644
--- a/src/objective-c/!ProtoCompiler.podspec
+++ b/src/objective-c/!ProtoCompiler.podspec
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler'
-  v = '3.0.0-beta-3.1'
+  v = '3.0.0'
   s.version  = v
   s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
   s.description = <<-DESC
@@ -108,7 +108,7 @@ Pod::Spec.new do |s|
                      'google/**/*.proto' # Well-known protobuf types
 
   # Restrict the protobuf runtime version to the one supported by this version of protoc.
-  s.dependency 'Protobuf', v
+  s.dependency 'Protobuf', '~> 3.0'
   # For the Protobuf dependency not to complain:
   s.ios.deployment_target = '7.1'
   s.osx.deployment_target = '10.9'
@@ -120,7 +120,7 @@ Pod::Spec.new do |s|
   repo_root = '../..'
   plugin = 'grpc_objective_c_plugin'
   s.prepare_command = <<-CMD
-    if [ ! -f protoc ]; then
+    if [ ! -f bin/protoc ]; then
       cd #{repo_root}
       # This will build protoc from the Protobuf submodule of gRPC, and put it in
       # #{repo_root}/bins/opt/protobuf.
@@ -129,7 +129,9 @@ Pod::Spec.new do |s|
       # _we do not want_. Find a way for this to always build from source.
       make #{plugin}
       cd -
+    else
+      mv bin/protoc .
+      mv include/google .
     fi
   CMD
-
 end
diff --git a/src/objective-c/README.md b/src/objective-c/README.md
index 6e917ddd81..909b12bab2 100644
--- a/src/objective-c/README.md
+++ b/src/objective-c/README.md
@@ -48,7 +48,7 @@ Pod::Spec.new do |s|
   src = '.'
 
   # We'll use protoc with the gRPC plugin.
-  s.dependency '!ProtoCompiler-gRPCPlugin', '~> 1.0.0-pre1'
+  s.dependency '!ProtoCompiler-gRPCPlugin', '~> 1.0.0-pre1.2'
 
   # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
   pods_root = '<path to your Podfile>/Pods'
diff --git a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
index 7222a80b88..974a6765c7 100644
--- a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = '10.9'
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1.2"
 
   repo_root = '../../../..'
   bin_dir = "#{repo_root}/bins/$CONFIG"
diff --git a/src/objective-c/examples/SwiftSample/ViewController.swift b/src/objective-c/examples/SwiftSample/ViewController.swift
index e7bab13762..66d4fa9412 100644
--- a/src/objective-c/examples/SwiftSample/ViewController.swift
+++ b/src/objective-c/examples/SwiftSample/ViewController.swift
@@ -91,7 +91,7 @@ class ViewController: UIViewController {
 
     call.startWithWriteable(GRXWriteable { response, error in
       if let response = response as? NSData {
-        NSLog("3. Received response:\n\(RMTSimpleResponse(data: response, error: nil))")
+        NSLog("3. Received response:\n\(try! RMTSimpleResponse(data: response))")
       } else {
         NSLog("3. Finished with error: \(error!)")
       }
diff --git a/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
index 53ba101913..3d28234fa2 100644
--- a/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = '10.9'
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1.2"
 
   repo_root = '../../../..'
   bin_dir = "#{repo_root}/bins/$CONFIG"
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 727d628885..6074175a44 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -50,6 +50,7 @@ SETUP_REQUIRES = (
 )
 
 INSTALL_REQUIRES = (
+    'protobuf>=3.0.0',
     'grpcio>=0.15.0',
 )
 
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 0afaf7dfa2..5c60eaca3a 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -63,7 +63,7 @@ INSTALL_REQUIRES = (
     'grpcio>=0.14.0',
     'grpcio-health-checking>=0.14.0',
     'oauth2client>=1.4.7',
-    'protobuf>=3.0.0a3',
+    'protobuf>=3.0.0',
     'six>=1.10',
 )
 
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index bd0e8b2c13..e6f8290200 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -33,7 +33,7 @@
       "xmlDoc": true
     },
     "dependencies": {
-      "Ix-Async": "1.2.5"
+      "System.Interactive.Async": "3.0.0"
     },
     "frameworks": {
       "net45": { },
diff --git a/templates/src/csharp/Grpc.Examples.MathClient/project.json.template b/templates/src/csharp/Grpc.Examples.MathClient/project.json.template
index 67151dbcfa..51c5e85c66 100644
--- a/templates/src/csharp/Grpc.Examples.MathClient/project.json.template
+++ b/templates/src/csharp/Grpc.Examples.MathClient/project.json.template
@@ -1,7 +1,7 @@
 %YAML 1.2
 --- |
   {
-    <%include file="../build_options.include" args="executable=True"/>
+    <%include file="../build_options.include" args="executable=True,includeRuntimes=False"/>
     "dependencies": {
       "Grpc.Examples": {
         "target": "project"
diff --git a/templates/src/csharp/Grpc.Examples.MathServer/project.json.template b/templates/src/csharp/Grpc.Examples.MathServer/project.json.template
index 67151dbcfa..51c5e85c66 100644
--- a/templates/src/csharp/Grpc.Examples.MathServer/project.json.template
+++ b/templates/src/csharp/Grpc.Examples.MathServer/project.json.template
@@ -1,7 +1,7 @@
 %YAML 1.2
 --- |
   {
-    <%include file="../build_options.include" args="executable=True"/>
+    <%include file="../build_options.include" args="executable=True,includeRuntimes=False"/>
     "dependencies": {
       "Grpc.Examples": {
         "target": "project"
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
index 93151f2b89..af1ee42509 100644
--- a/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
+++ b/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
@@ -1,7 +1,7 @@
 %YAML 1.2
 --- |
   {
-    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    <%include file="../build_options.include" args="executable=True,includeData=True,includeRuntimes=False"/>
     "dependencies": {
       "Grpc.IntegrationTesting": {
         "target": "project"
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
index 93151f2b89..af1ee42509 100644
--- a/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
+++ b/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
@@ -1,7 +1,7 @@
 %YAML 1.2
 --- |
   {
-    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    <%include file="../build_options.include" args="executable=True,includeData=True,includeRuntimes=False"/>
     "dependencies": {
       "Grpc.IntegrationTesting": {
         "target": "project"
diff --git a/templates/src/csharp/build_options.include b/templates/src/csharp/build_options.include
index 169a45a808..a200897e0f 100644
--- a/templates/src/csharp/build_options.include
+++ b/templates/src/csharp/build_options.include
@@ -1,4 +1,4 @@
-<%page args="executable=False,includeData=False"/>\
+<%page args="executable=False,includeData=False,includeRuntimes=True"/>\
 "buildOptions": {
   % if executable:
     "emitEntryPoint": true
@@ -51,6 +51,8 @@
       }
     }
   },
+  %endif
+  % if includeRuntimes:
   "runtimes": {
     "win7-x64": { },
     "debian.8-x64": { },
diff --git a/templates/tools/dockerfile/csharp_deps.include b/templates/tools/dockerfile/csharp_deps.include
index 489dc44a43..7e89dec2cc 100644
--- a/templates/tools/dockerfile/csharp_deps.include
+++ b/templates/tools/dockerfile/csharp_deps.include
@@ -14,3 +14,5 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y ${'\\'}
     ca-certificates-mono ${'\\'}
     nuget ${'\\'}
     && apt-get clean
+
+RUN nuget update -self
diff --git a/third_party/protobuf b/third_party/protobuf
-Subproject bdeb215cab2985195325fcd5e70c3fa751f46e0
+Subproject e8ae137c96444ea313485ed1118c5e43b2099cf
diff --git a/tools/codegen/extensions/gen_reflection_proto.sh b/tools/codegen/extensions/gen_reflection_proto.sh
index 45a1a9f4ec..bd8aac6a7b 100755
--- a/tools/codegen/extensions/gen_reflection_proto.sh
+++ b/tools/codegen/extensions/gen_reflection_proto.sh
@@ -36,7 +36,7 @@ SRC_DIR="src/cpp/ext"
 INCLUDE_DIR="grpc++/ext"
 TMP_DIR="tmp"
 GRPC_PLUGIN="bins/opt/grpc_cpp_plugin"
-PROTOC=third_party/protobuf/src/protoc
+PROTOC="bins/opt/protobuf/protoc"
 
 set -e
 
diff --git a/tools/distrib/check_generated_pb_files.sh b/tools/distrib/check_generated_pb_files.sh
index 557067883c..6b93895484 100755
--- a/tools/distrib/check_generated_pb_files.sh
+++ b/tools/distrib/check_generated_pb_files.sh
@@ -38,3 +38,6 @@ docker build -t grpc_check_generated_pb_files tools/dockerfile/grpc_check_genera
 
 # run check_pb_files against the checked out codebase
 docker run -e TEST=$TEST --rm=true -v ${HOST_GIT_ROOT:-`pwd`}:/var/local/jenkins/grpc -t grpc_check_generated_pb_files /var/local/jenkins/grpc/tools/dockerfile/grpc_check_generated_pb_files/check_pb_files.sh
+
+# If the test fails, please make sure your protobuf submodule is up-to-date and run
+# tools/codegen/extensions/gen_reflection_proto.sh to update the generated files.
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index bb1f1cf085..e8105992dc 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -177,7 +177,7 @@ setuptools.setup(
   packages=setuptools.find_packages('.'),
   namespace_packages=['grpc'],
   install_requires=[
-    'protobuf>=3.0.0a3',
+    'protobuf>=3.0.0',
     'grpcio>=0.15.0',
   ],
   package_data=package_data(),
diff --git a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
index e3d52f0cb5..087cc4e2bb 100644
--- a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
@@ -95,6 +95,8 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
     nuget \
     && apt-get clean
 
+RUN nuget update -self
+
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
 RUN ln -s /usr/bin/ccache /usr/local/bin/g++
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
index 81e3fdc380..328825392b 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
@@ -112,5 +112,7 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
     nuget \
     && apt-get clean
 
+RUN nuget update -self
+
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
index 25c6fe6ec6..4921815190 100644
--- a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
@@ -95,6 +95,8 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
     nuget \
     && apt-get clean
 
+RUN nuget update -self
+
 
 # Install dotnet SDK based on https://www.microsoft.com/net/core#debian
 RUN apt-get update && apt-get install -y curl libunwind8 gettext
diff --git a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
index e3d52f0cb5..087cc4e2bb 100644
--- a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
@@ -95,6 +95,8 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
     nuget \
     && apt-get clean
 
+RUN nuget update -self
+
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
 RUN ln -s /usr/bin/ccache /usr/local/bin/g++
diff --git a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
index 13f7c10f92..2540b52ec8 100644
--- a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
@@ -80,6 +80,8 @@ RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
     nuget \
     && apt-get clean
 
+RUN nuget update -self
+
 #=================
 # C++ dependencies
 RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 8be15dda4e..9e6ba380f1 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -701,14 +701,16 @@ class ObjCLanguage(object):
     _check_compiler(self.args.compiler, ['default'])
 
   def test_specs(self):
-    return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'],
-                                 timeout_seconds=None,
-                                 shortname='objc-tests',
-                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS),
-            self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
-                                 timeout_seconds=30*60,
-                                 shortname='objc-examples-build',
-                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    return [
+        self.config.job_spec(['src/objective-c/tests/run_tests.sh'],
+                              timeout_seconds=None,
+                              shortname='objc-tests',
+                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
+        self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
+                              timeout_seconds=30*60,
+                              shortname='objc-examples-build',
+                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
+    ]
 
   def pre_build_steps(self):
     return []
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index b602d69564..04123ee5d8 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -45,7 +45,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
  f8ac463766281625ad710900479130c7fcb4d63b third_party/nanopb (nanopb-0.3.4-29-gf8ac463)
- bdeb215cab2985195325fcd5e70c3fa751f46e0f third_party/protobuf (v3.0.0-beta-3.3)
+ e8ae137c96444ea313485ed1118c5e43b2099cf1 third_party/protobuf (v3.0.0-beta-4-74-ge8ae137)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
 EOF