diff options
Diffstat (limited to 'test/cpp/end2end/client_lb_end2end_test.cc')
-rw-r--r-- | test/cpp/end2end/client_lb_end2end_test.cc | 70 |
1 files changed, 68 insertions, 2 deletions
diff --git a/test/cpp/end2end/client_lb_end2end_test.cc b/test/cpp/end2end/client_lb_end2end_test.cc index 8896fc6cae..7fe0da8aae 100644 --- a/test/cpp/end2end/client_lb_end2end_test.cc +++ b/test/cpp/end2end/client_lb_end2end_test.cc @@ -279,9 +279,14 @@ class ClientLbEnd2endTest : public ::testing::Test { void WaitForServer( const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, - size_t server_idx, const grpc_core::DebugLocation& location) { + size_t server_idx, const grpc_core::DebugLocation& location, + bool ignore_failure = false) { do { - CheckRpcSendOk(stub, location); + if (ignore_failure) { + SendRpc(stub); + } else { + CheckRpcSendOk(stub, location); + } } while (servers_[server_idx]->service_.request_count() == 0); ResetCounters(); } @@ -403,6 +408,36 @@ TEST_F(ClientLbEnd2endTest, PickFirstBackOffMinReconnect) { gpr_atm_rel_store(&g_connection_delay_ms, 0); } +TEST_F(ClientLbEnd2endTest, PickFirstResetConnectionBackoff) { + ChannelArguments args; + constexpr int kInitialBackOffMs = 1000; + args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, kInitialBackOffMs); + const std::vector<int> ports = {grpc_pick_unused_port_or_die()}; + auto channel = BuildChannel("pick_first", args); + auto stub = BuildStub(channel); + SetNextResolution(ports); + // The channel won't become connected (there's no server). + EXPECT_FALSE( + channel->WaitForConnected(grpc_timeout_milliseconds_to_deadline(10))); + // Bring up a server on the chosen port. + StartServers(1, ports); + const gpr_timespec t0 = gpr_now(GPR_CLOCK_MONOTONIC); + // Wait for connect, but not long enough. This proves that we're + // being throttled by initial backoff. + EXPECT_FALSE( + channel->WaitForConnected(grpc_timeout_milliseconds_to_deadline(10))); + // Reset connection backoff. + experimental::ChannelResetConnectionBackoff(channel.get()); + // Wait for connect. Should happen ~immediately. + EXPECT_TRUE( + channel->WaitForConnected(grpc_timeout_milliseconds_to_deadline(10))); + const gpr_timespec t1 = gpr_now(GPR_CLOCK_MONOTONIC); + const grpc_millis waited_ms = gpr_time_to_millis(gpr_time_sub(t1, t0)); + gpr_log(GPR_DEBUG, "Waited %" PRId64 " milliseconds", waited_ms); + // We should have waited less than kInitialBackOffMs. + EXPECT_LT(waited_ms, kInitialBackOffMs); +} + TEST_F(ClientLbEnd2endTest, PickFirstUpdates) { // Start servers and send one RPC per server. const int kNumServers = 3; @@ -507,6 +542,37 @@ TEST_F(ClientLbEnd2endTest, PickFirstManyUpdates) { EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); } +TEST_F(ClientLbEnd2endTest, PickFirstReresolutionNoSelected) { + // Prepare the ports for up servers and down servers. + const int kNumServers = 3; + const int kNumAliveServers = 1; + StartServers(kNumAliveServers); + std::vector<int> alive_ports, dead_ports; + for (size_t i = 0; i < kNumServers; ++i) { + if (i < kNumAliveServers) { + alive_ports.emplace_back(servers_[i]->port_); + } else { + dead_ports.emplace_back(grpc_pick_unused_port_or_die()); + } + } + auto channel = BuildChannel("pick_first"); + auto stub = BuildStub(channel); + // The initial resolution only contains dead ports. There won't be any + // selected subchannel. Re-resolution will return the same result. + SetNextResolution(dead_ports); + gpr_log(GPR_INFO, "****** INITIAL RESOLUTION SET *******"); + for (size_t i = 0; i < 10; ++i) CheckRpcSendFailure(stub); + // Set a re-resolution result that contains reachable ports, so that the + // pick_first LB policy can recover soon. + SetNextResolutionUponError(alive_ports); + gpr_log(GPR_INFO, "****** RE-RESOLUTION SET *******"); + WaitForServer(stub, 0, DEBUG_LOCATION, true /* ignore_failure */); + CheckRpcSendOk(stub, DEBUG_LOCATION); + EXPECT_EQ(servers_[0]->service_.request_count(), 1); + // Check LB policy name for the channel. + EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); +} + TEST_F(ClientLbEnd2endTest, RoundRobin) { // Start servers and send one RPC per server. const int kNumServers = 3; |