[ 
https://issues.apache.org/jira/browse/BEAM-4649?focusedWorklogId=121986&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-121986
 ]

ASF GitHub Bot logged work on BEAM-4649:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 11/Jul/18 17:45
            Start Date: 11/Jul/18 17:45
    Worklog Time Spent: 10m 
      Work Description: robertwb closed pull request #5923: [BEAM-4649] Wait on 
connection channel to be ready
URL: https://github.com/apache/beam/pull/5923
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/sdks/python/apache_beam/runners/worker/sdk_worker.py 
b/sdks/python/apache_beam/runners/worker/sdk_worker.py
index 8e94e952d68..a97e4242f93 100644
--- a/sdks/python/apache_beam/runners/worker/sdk_worker.py
+++ b/sdks/python/apache_beam/runners/worker/sdk_worker.py
@@ -52,13 +52,14 @@ def __init__(self, control_address, worker_count, 
credentials=None):
     self._worker_count = worker_count
     self._worker_index = 0
     if credentials is None:
-      logging.info('Creating insecure channel.')
+      logging.info('Creating insecure control channel.')
       self._control_channel = grpc.insecure_channel(control_address)
     else:
-      logging.info('Creating secure channel.')
+      logging.info('Creating secure control channel.')
       self._control_channel = grpc.secure_channel(control_address, credentials)
-      grpc.channel_ready_future(self._control_channel).result()
-      logging.info('Secure channel established.')
+    grpc.channel_ready_future(self._control_channel).result(timeout=60)
+    logging.info('Control channel established.')
+
     self._control_channel = grpc.intercept_channel(
         self._control_channel, WorkerIdInterceptor())
     self._data_channel_factory = data_plane.GrpcClientDataChannelFactory(


 

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 121986)
    Time Spent: 1h 20m  (was: 1h 10m)

> Failures in beam_PostCommit_Py_ValCont due to exception in 
> read_log_control_messages
> ------------------------------------------------------------------------------------
>
>                 Key: BEAM-4649
>                 URL: https://issues.apache.org/jira/browse/BEAM-4649
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-harness
>    Affects Versions: 2.6.0
>            Reporter: Alan Myrvold
>            Assignee: Alan Myrvold
>            Priority: Major
>             Fix For: 2.6.0
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> Example
> https://console.cloud.google.com/dataflow/jobsDetail/locations/us-central1/jobs/2018-06-26_11_04_04-14383422363721841333?project=apache-beam-testing
>  
> All of the failures have the same exception in the docker logs:
> I  2018/06/26 18:05:12 Executing: python -m 
> apache_beam.runners.worker.sdk_worker_main
> I  Exception in thread read_log_control_messages:
> I  Traceback (most recent call last):
> I    File "/usr/local/lib/python2.7/threading.py", line 801, in 
> __bootstrap_inner
> I      self.run()
> I    File "/usr/local/lib/python2.7/threading.py", line 754, in run
> I      self.__target(*self.__args, **self.__kwargs)
> I    File 
> "/usr/local/lib/python2.7/site-packages/apache_beam/runners/worker/log_handler.py",
>  line 61, in <lambda>
> I      target=lambda: self._read_log_control_messages(log_control_messages),
> I    File 
> "/usr/local/lib/python2.7/site-packages/apache_beam/runners/worker/log_handler.py",
>  line 107, in _read_log_control_messages
> I      for _ in log_control_iterator:
> I    File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 
> 344, in next
> I      return self._next()
> I    File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 
> 335, in _next
> I      raise self
> I  _Rendezvous: <_Rendezvous of RPC that terminated with 
> (StatusCode.UNAVAILABLE, Connect Failed)>
> I  
> I  Traceback (most recent call last):
> I    File "/usr/local/lib/python2.7/runpy.py", line 174, in 
> _run_module_as_main
> I      "__main__", fname, loader, pkg_name)
> I    File "/usr/local/lib/python2.7/runpy.py", line 72, in _run_code
> I      exec code in run_globals
> I    File 
> "/usr/local/lib/python2.7/site-packages/apache_beam/runners/worker/sdk_worker_main.py",
>  line 195, in <module>
> I      main(sys.argv)
> I    File 
> "/usr/local/lib/python2.7/site-packages/apache_beam/runners/worker/sdk_worker_main.py",
>  line 134, in main
> I      worker_count=_get_worker_count(sdk_pipeline_options)).run()
> I    File 
> "/usr/local/lib/python2.7/site-packages/apache_beam/runners/worker/sdk_worker.py",
>  line 104, in run
> I      for work_request in control_stub.Control(get_responses()):
> I    File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 
> 344, in next
> I      return self._next()
> I    File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 
> 324, in _next
> I      raise self
> I  grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with 
> (StatusCode.UNAVAILABLE, Connect Failed)>
> Looks like a race condition?
> Harness log with startup message is appearing *after* docker log with 
> connection exception.
> Harness log:
> 2018-06-26 10:40:59.328 PDT Launched Beam Fn Logging service url: 
> "localhost:12370"
> Docker log:
> 2018-06-26 10:40:53.361 PDT Exception in thread read_log_control_messages:



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