handle empty string for qps workers in driver and dont quit them on netperf

1 files changed, 1 insertions, 1 deletions

diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index ea0b38e8ad..22b2cd080d 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -101,7 +101,7 @@ static std::unordered_map<string, std::deque<int>> get_hosts_and_cores(
 
 static deque<string> get_workers(const string& name) {
   char* env = gpr_getenv(name.c_str());
-  if (!env) return deque<string>();
+  if (!env || strlen(env) == 0) return deque<string>();
 
   deque<string> out;
   char* p = env;