Run test error

λ  python .\testclient.py
E1030 15:36:09.480000000 11252 src/core/ext/transport/chttp2/server/insecure/server_chttp2.c:38] {"created":"@1509348969.480000000","description":"No address added out of total 1 resolved","file":"src/core/ext/transport/chttp2/server/chttp2_server.c","file_line":245,"referenced_errors":[{"created":"@1509348969.480000000","description":"Failed to add port to server","file":"src/core/lib/iomgr/tcp_server_windows.c","file_line":510,"referenced_errors":[{"created":"@1509348969.480000000","description":"OS Error","file":"src/core/lib/iomgr/tcp_server_windows.c","file_line":199,"os_error":"Only one usage of each socket address (protocol/network address/port) is normally permitted.\r\n","syscall":"bind","wsa_error":10048}]}]}
.....ERROR:root:Exception iterating requests!
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\grpc\_channel.py", line 185, in consume_request_iterator
    request = next(request_iterator)
  File "C:\ProgramData\Anaconda3\lib\site-packages\aiogrpc\utils.py", line 223, in __next__
    raise r
  File "C:\ProgramData\Anaconda3\lib\site-packages\aiogrpc\utils.py", line 204, in _next
    self._q.put((await nf, False))
  File ".\testclient.py", line 119, in test_input2
    raise ValueError('testerror')
ValueError: testerror
...
----------------------------------------------------------------------
Ran 8 tests in 1.314s

OK

[hubo1016]

This is a correct behavior. This test case covers the situation when the request stream or response stream raises an exception inside the iteration. When these exceptions occur, grpc.io core generates this log.

It might be possible to drop this log with a customized logger, but maybe it is not necessary?

[hubo1016]

fixed by a367421158bfeadd2a5bba100c085b2c5a4dc7ac