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Status: Assigned
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Last visit > 30 days ago
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Pri: 1
Type: Bug-Regression



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page_cycler_v2.intl_ko_th_vi flakily failing on Nexus 7v2, 6, 5, 9

Project Member Reported by rnep...@chromium.org, Dec 6 2016

Issue description

Summary: page_cycler_v2.intl_ko_th_vi flakily failing on Nexus 7v2, 6, 5, 9 (was: page_cycler_v2.intl_ko_th_vi flakily failing on Nexus 7v2, 6, 5, 9, )
Owner: mikec...@chromium.org
Mike, can you help us get a callstack from some of the recent failures:
https://luci-milo.appspot.com/buildbot/chromium.perf/Android%20Nexus7v2%20Perf%20%282%29/3559
https://luci-milo.appspot.com/buildbot/chromium.perf/Android%20Nexus5%20Perf%20%282%29/4640
https://luci-milo.appspot.com/buildbot/chromium.perf/Android%20Nexus6%20Perf%20%282%29/4651

Then ping me so I can try and cc folks who might be able to help us dig into it.
Im seeing this crash...
Is this one of the crashes typically caused by Chrome crashing? Or is it a problem itself.

Traceback (most recent call last):
  _RunStoryAndProcessErrorIfNeeded at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:111
    test.DidRunStory(state.platform)
  DidRunStory at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py:312
    platform.tracing_controller.StopTracing()
  StopTracing at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/core/tracing_controller.py:47
    return self._tracing_controller_backend.StopTracing()
  StopTracing at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py:105
    self._IssueClockSyncMarker()
  _IssueClockSyncMarker at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py:200
    self._RecordIssuerClockSyncMarker)
  RecordClockSyncMarker at /b/rr/tmpVF0cS1/w/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py:177
    raise ChromeClockSyncError('Cannot issue clock sync. No devtools clients')
ChromeClockSyncError: Cannot issue clock sync. No devtools clients

Locals:
  devtools_clients                             : []
  record_controller_clock_sync_marker_callback : <bound method TracingControllerBackend._RecordIssuerClockSyncMarker of <telemetry.internal.platform.tracing_controller_backend.TracingControllerBackend object at 0x7fc98f623390>>
  sync_id       
Yep, this is definitely an indicator of Chrome crashing.
Cc: jbudorick@chromium.org
Looking again at this failure on the Nexus 6 bot. During the failed test, this get output to logcat. If it was just Chrome crashing, Im not sure I would expect the forwarder to also die like this. Not sure.

+jbudorick, are these logs expected if Chrome crashes?

2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:socket.cc(357)] send: Broken pipe
2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:socket.cc(334)] read: Bad file number
2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:command.cc(65)] Read() error, endpoint was unexpectedly closed.
2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:socket.cc(357)] send: Bad file number
2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:device_listener.cc(102)] Host could not connect to server.
2K86J:  01-10 22:47:52.396  3974 22250 E chromium: [0110/224752:ERROR:device_listener.cc(105)] Adb Control connection lost. Listener port: 47984
These same logs show up in the Nexus 9 bot for this failure as well...

02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:socket.cc(357)] send: Broken pipe
02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:socket.cc(334)] read: Bad file number
02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:command.cc(65)] Read() error, endpoint was unexpectedly closed.
02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:socket.cc(357)] send: Bad file number
02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:device_listener.cc(102)] Host could not connect to server.
02657:  01-09 00:28:56.992 26190 22269 E chromium: [0109/002856:ERROR:device_listener.cc(105)] Adb Control connection lost. Listener port: 42581
This is one of the tests that is part of www. crbug.com/667470 .
Cc: -charliea@chromium.org
Un-CCing myself. Feel free to re-CC me if necessary.
#5: I don't think the device_listener ones are expected on chrome crash. Not sure  about the others.
Status: Assigned (was: Untriaged)

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