diff --git a/Core/test.cpp b/Core/test.cpp
index 3c7c31e..8f57f5d 100644
--- a/Core/test.cpp
+++ b/Core/test.cpp
@@ -119,8 +119,8 @@ class MyMsgHandlerClass : public MsgHandler<MyMsgHandlerClass>
     }
     bool testMsgBus1(const std::string& msgid, MsgBusParam& param, bool& is_continue)
     {
-        printMsg(msgid, param, __FUNCTION__);
-        GenerateNextTestParam(param);
+        //printMsg(msgid, param, __FUNCTION__);
+        //GenerateNextTestParam(param);
         //NetMsgBusSendMsg("test.receiverclient_C", "rsp_msg_netmsgbus_testmsg1", param, SendDirectToClient);
         //NetMsgBusSendMsg("", "rsp_msg_netmsgbus_testmsg1", param, SendUseServerRelay);
         //sleep(1);
@@ -137,7 +137,7 @@ class MyMsgHandlerClass : public MsgHandler<MyMsgHandlerClass>
     }
     bool testMsgBus3(const std::string& msgid, MsgBusParam& param, bool& is_continue)
     {
-        printMsg(msgid, param, __FUNCTION__);
+        //printMsg(msgid, param, __FUNCTION__);
         std::string rspstr("Yeah! I send the rsp data to you.");
         param = CustomType2Param(rspstr);
         //sleep(3);
@@ -983,8 +983,8 @@ int main()
     //threadpool::queue_work_task(boost::bind(testlocalmsgbus), 0);
     //threadpool::queue_work_task(boost::bind(testlocalmsgbus), 1);
     //testconcurrent_local();
-    testremotemsgbus();
-    //testremotemsgbus_without_server();
+    //testremotemsgbus();
+    testremotemsgbus_without_server();
     MsgHandlerMgr::DropAllInstance();
     EventLoopPool::DestroyEventLoopPool();
     NetMsgBusDisConnectAll();
diff --git a/PyPort/NetMsgBusReq2ReceiverMgr.py b/PyPort/NetMsgBusReq2ReceiverMgr.py
index 7df8d32..bbde7bd 100755
--- a/PyPort/NetMsgBusReq2ReceiverMgr.py
+++ b/PyPort/NetMsgBusReq2ReceiverMgr.py
@@ -87,7 +87,7 @@ def ReceivePack(self):
                 return
             rsp.data = self.read_buffer[rsp.HeadSize():rsp.data_len + rsp.HeadSize()]
             self.read_buffer = self.read_buffer[rsp.data_len + rsp.HeadSize():]
-            log.debug('reading receiver rsp : future_id :%d, data:%s ', rsp.sync_sid, rsp.data)
+            #log.debug('reading receiver rsp : future_id :%d, data:%s ', rsp.sync_sid, rsp.data)
             self.req2receivermgr.handle_channel_rsp(rsp.sync_sid, rsp.data)
 
 class TcpClientPool:
@@ -150,7 +150,7 @@ def SendMsgDirectToClient(self, ipport_or_name, data, timeout):
             if self.GetCachedClient(ipport_or_name) is None:
                 destclient = self.server_conn_mgr.ReqReceiverInfo(ipport_or_name)
                 if destclient is None:
-                    return False
+                    return (False, None)
                 with self.cache_lock:
                     self.cached_client_info[ipport_or_name] = destclient;
                 ipport_or_name = destclient
diff --git a/PyPort/NetMsgBusTest.py b/PyPort/NetMsgBusTest.py
index 6645084..1290e2a 100755
--- a/PyPort/NetMsgBusTest.py
+++ b/PyPort/NetMsgBusTest.py
@@ -24,6 +24,21 @@ def StaticOnMsg(msgid, msgparam):
         return test_localmsg_handler(msgid, msgparam)
 
 
+class ConcurrentTest(threading.Thread):
+    def __init__(self):
+        threading.Thread.__init__(self)
+
+    def run(self):
+        times = 10000
+        while times > 0:
+            times = times - 1;
+            rsp = NetMsgBus.NetSyncGetData(('127.0.0.1', 9101), 'msg_netmsgbus_testmsg1', '{"testkey":11111, "testlongdata": "frompythondata"}', 3)
+            if rsp[0] and rsp[1]:
+                pass
+                #print 'sync get data from receiver: ' + rsp[1]
+            else:
+                print 'sync get data from receiver failed.'
+
 LocalMsgBus.InitMsgBus()
 
 test_handler = TestHandler()
@@ -93,7 +108,19 @@ def StaticOnMsg(msgid, msgparam):
 else:
     print 'async get data from receiver using name failed'
 
+log.debug('begin ConcurrentTest')
+concurrent_tests = []
+for i in range(10):
+    concurrent_tests.append(ConcurrentTest())
+    concurrent_tests[i].daemon = True
+
+for i in range(10):
+    concurrent_tests[i].start()
 # wait for test receiver server, wait for data from other client. and test for long no active
+for i in range(10):
+    concurrent_tests[i].join()
+
+log.debug('concurrent_tests finished.')
 log.debug('waiting 30s to quit ...')
 NetMsgBus.Wait(30)
 NetMsgBus.Destroy()