Add a thread stress end2end test

test/cpp/end2end/end2end_test.cc

@@ -576,6 +576,17 @@ TEST_F(End2endTest, ClientCancelsBidi) {
   EXPECT_EQ(grpc::StatusCode::CANCELLED, s.code());
 }
 
+TEST_F(End2endTest, ThreadStress) {
+  ResetStub();
+  std::vector<std::thread*> threads;
+  for (int i = 0; i < 100; ++i) {
+    threads.push_back(new std::thread(SendRpc, stub_.get(), 1000));
+  }
+  for (int i = 0; i < 100; ++i) {
+    threads[i]->join();
+    delete threads[i];
+  }
+}
 
 }  // namespace testing
 }  // namespace grpc