I0914 12:05:40.258058747   14907 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x7fa87c004af0, deadline=gpr_timespec { 
tv_sec: 10, tv_nsec: 0, clock_type: 3 }, reserved=(nil))
I0914 12:05:40.262040844   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: QUEUE_TIMEOUT
I0914 12:05:40.262107598   14901 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fca250, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 362102878, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.262387036   14886 completion_queue.c:861]     
RETURN_EVENT[0x1fd21e0]: QUEUE_TIMEOUT
I0914 12:05:40.262416496   14886 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fd21e0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 362410478, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.288670933    8291 completion_queue.c:861]     
RETURN_EVENT[0x1fc20c0]: QUEUE_TIMEOUT
I0914 12:05:40.288740234    8291 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fc20c0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 388734668, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.362347155   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: QUEUE_TIMEOUT
I0914 12:05:40.362500837   14901 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fca250, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 462491875, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.362647536   14886 completion_queue.c:861]     
RETURN_EVENT[0x1fd21e0]: QUEUE_TIMEOUT
I0914 12:05:40.362678953   14886 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fd21e0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 462672886, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.388942072    8291 completion_queue.c:861]     
RETURN_EVENT[0x1fc20c0]: QUEUE_TIMEOUT
I0914 12:05:40.389056726    8291 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fc20c0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 489047123, clock_type: 1 }, reserved=(nil))
D0914 12:05:40.392114240   14901 connectivity_state.c:135]   CONWATCH: 
0x7fa80c01eed8 server_transport: from IDLE [cur=READY] notify=0x7fa80c01a138
D0914 12:05:40.392180813   14901 connectivity_state.c:135]   CONWATCH: 
0x7fa80c01eed8 server_transport: from READY [cur=READY] 
notify=0x7fa80c01a138
I0914 12:05:40.462920251   14886 completion_queue.c:861]     
RETURN_EVENT[0x1fd21e0]: QUEUE_TIMEOUT
I0914 12:05:40.463057779   14886 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fd21e0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 563049680, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.463475112   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: QUEUE_TIMEOUT
I0914 12:05:40.463502256   14901 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fca250, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 563497963, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.489336198    8291 completion_queue.c:861]     
RETURN_EVENT[0x1fc20c0]: QUEUE_TIMEOUT
I0914 12:05:40.489426090    8291 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fc20c0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 589417977, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.563312610   14886 completion_queue.c:861]     
RETURN_EVENT[0x1fd21e0]: QUEUE_TIMEOUT
I0914 12:05:40.563392795   14886 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fd21e0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 663385808, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.563684056   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: QUEUE_TIMEOUT
I0914 12:05:40.563706730   14901 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fca250, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 663702959, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.589633763    8291 completion_queue.c:861]     
RETURN_EVENT[0x1fc20c0]: QUEUE_TIMEOUT
I0914 12:05:40.589719300    8291 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fc20c0, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 689710645, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.663776 14906 single_thread_worker.cpp:84] SingleThreadWorker 
stop: HeartbeatClient

// stop bidirectional stream
I0914 12:05:40.663796024    8267 call.c:583]                 
grpc_call_cancel(call=0x1fdb758, reserved=(nil))
I0914 12:05:40.664022389    8267 client_channel.c:1300]     
 OP[client-channel:0x1fdbe10]: [UNCOVERED] CANCEL:"Cancelled"
I0914 12:05:40.664053075    8267 http_client_filter.c:435]   
OP[http-client:0x1fe0900]: [UNCOVERED] CANCEL:"Cancelled"
I0914 12:05:40.664066269    8267 connected_channel.c:70]     
OP[connected:0x1fe0930]: [UNCOVERED] CANCEL:"Cancelled"
I0914 12:05:40.664119609    8267 completion_queue.c:564]     
cq_end_op_for_next(exec_ctx=0x7fffc824c4b0, cc=0x1fd21e0, tag=0x1fdc078, 
error="No Error", done=0x552280, done_arg=0x1fe1778, storage=0x1fe1780)
I0914 12:05:40.664163094   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: QUEUE_TIMEOUT
I0914 12:05:40.664193123   14901 completion_queue.c:764]     
grpc_completion_queue_next(cc=0x1fca250, deadline=gpr_timespec { tv_sec: 
1505415940, tv_nsec: 764188067, clock_type: 1 }, reserved=(nil))
I0914 12:05:40.664274513   14901 completion_queue.c:564]     
cq_end_op_for_next(exec_ctx=0x7fa86f7fdb80, cc=0x1fca250, 
tag=0x7fa87c01d138, error="No Error", done=0x552280, 
done_arg=0x7fa80c010f58, storage=0x7fa80c010f60)
D0914 12:05:40.664341644   14901 call.c:706]                 
get_final_status SVR
D0914 12:05:40.664383484   14901 call.c:709]                   1: 
{"created":"@1505415940.664334949","description":"Error received from 
peer","file":"src/core/lib/surface/call.c","file_line":955,"grpc_message":"Received
 
RST_STREAM with error code 8","grpc_status":1}
I0914 12:05:40.664424456   14901 completion_queue.c:564]     
cq_end_op_for_next(exec_ctx=0x7fa86f7fdb80, cc=0x1fca250, 
tag=0x7fa80c005dc0, error="No Error", done=0x552280, 
done_arg=0x7fa80c010e88, storage=0x7fa80c010e90)

I0914 12:05:40.664525623   14901 completion_queue.c:861]     
RETURN_EVENT[0x1fca250]: OP_COMPLETE: tag:0x7fa87c01d138 OK
I0914 12:05:40.664557682   14901 call.c:634]                 
grpc_call_cancel_with_status(c=0x7fa80c00f7f8, status=1, 
description=Cancelled on the server side, reserved=(nil))


// start to shutdown CQ
I0914 12:05:40.664123966   14886 completion_queue.c:861]     
RETURN_EVENT[0x1fd21e0]: QUEUE_TIMEOUT
I0914 12:05:40.664660 14886 completion_queue_manager.cpp:103] Client 
CompletionQueue (0x1fd6670) quit.
I0914 12:05:40.664697968    8267 completion_queue.c:1086]   
 grpc_completion_queue_shutdown(cc=0x1fd21e0)
I0914 12:05:40.664711547    8267 completion_queue.c:1105]   
 grpc_completion_queue_destroy(cc=0x1fd21e0)
I0914 12:05:40.664717709    8267 completion_queue.c:1086]   
 grpc_completion_queue_shutdown(cc=0x1fd21e0)
E0914 12:05:40.664723704    8267 completion_queue.c:1112]    assertion 
failed: cq_event_queue_num_items(&cc->data.queue) == 0

Hi, all

When testing upgradation of the grpc to version 1.4.2. I encountered 
assertion in CQ shutdown. Can anyone give me some hint?

Thanks,
Yihao 

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