Move the gRPC client initialization into aio loop

Author: yinggeh

samples/client.py

@@ -38,13 +38,21 @@
 
 class LLMClient:
     def __init__(self, flags: argparse.Namespace):
-        self._client = grpcclient.InferenceServerClient(
-            url=flags.url, verbose=flags.verbose
-        )
         self._flags = flags
-        self._loop = asyncio.get_event_loop()
         self._results_dict = {}
 
+    def get_triton_client(self):
+        try:
+            triton_client = grpcclient.InferenceServerClient(
+                url=self._flags.url,
+                verbose=self._flags.verbose,
+            )
+        except Exception as e:
+            print("channel creation failed: " + str(e))
+            sys.exit()
+
+        return triton_client
+
     async def async_request_iterator(
         self, prompts, sampling_parameters, exclude_input_in_output
     ):
@@ -65,8 +73,9 @@ async def async_request_iterator(
 
     async def stream_infer(self, prompts, sampling_parameters, exclude_input_in_output):
         try:
+            triton_client = self.get_triton_client()
             # Start streaming
-            response_iterator = self._client.stream_infer(
+            response_iterator = triton_client.stream_infer(
                 inputs_iterator=self.async_request_iterator(
                     prompts, sampling_parameters, exclude_input_in_output
                 ),
@@ -138,7 +147,7 @@ async def run(self):
             print("FAIL: vLLM example")
 
     def run_async(self):
-        self._loop.run_until_complete(self.run())
+        asyncio.run(self.run())
 
     def create_request(
         self,