I don't understand why flakiness dashboard https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webgl_conformance_tests&tests=gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_conformance_glsl_bugs_loop_if_loop_gradient

does not show runs on android-marshmallow-arm64-rel

gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_conformance_glsl_bugs_loop_if_loop_gradient is flaky.

Findit has detected 4 new flake occurrences of this test. List
of all flake occurrences can be found at:
https://findit-for-me.appspot.com/flake/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyvQELEgVGbGFrZSKxAWNocm9taXVtQHRlbGVtZXRyeV9ncHVfaW50ZWdyYXRpb25fdGVzdEBncHVfdGVzdHMud2ViZ2xfY29uZm9ybWFuY2VfaW50ZWdyYXRpb25fdGVzdC5XZWJHTENvbmZvcm1hbmNlSW50ZWdyYXRpb25UZXN0LldlYmdsQ29uZm9ybWFuY2VfY29uZm9ybWFuY2VfZ2xzbF9idWdzX2xvb3BfaWZfbG9vcF9ncmFkaWVudAw.

Since these tests are still flaky, this issue has been moved back onto the Sheriff Bug Queue if it hasn't already.

If the result above is wrong, please file a bug using this link:
https://bugs.chromium.org/p/chromium/issues/entry?status=Unconfirmed&labels=Pri-1,Test-Findit-Wrong&components=Tools%3ETest%3EFindit%3EFlakiness&summary=%5BFindit%5D%20Flake%20Detection%20-%20Wrong%20result%3A%20gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_conformance_glsl_bugs_loop_if_loop_gradient&comment=Link%20to%20flake%20details%3A%20https://findit-for-me.appspot.com/flake/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyvQELEgVGbGFrZSKxAWNocm9taXVtQHRlbGVtZXRyeV9ncHVfaW50ZWdyYXRpb25fdGVzdEBncHVfdGVzdHMud2ViZ2xfY29uZm9ybWFuY2VfaW50ZWdyYXRpb25fdGVzdC5XZWJHTENvbmZvcm1hbmNlSW50ZWdyYXRpb25UZXN0LldlYmdsQ29uZm9ybWFuY2VfY29uZm9ybWFuY2VfZ2xzbF9idWdzX2xvb3BfaWZfbG9vcF9ncmFkaWVudAw

Automatically posted by the findit-for-me app (https://goo.gl/Ot9f7N).

gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_conformance_glsl_bugs_loop_if_loop_gradient is flaky.

Findit has detected 3 new flake occurrences of this test. List
of all flake occurrences can be found at:
https://findit-for-me.appspot.com/flake/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyvQELEgVGbGFrZSKxAWNocm9taXVtQHRlbGVtZXRyeV9ncHVfaW50ZWdyYXRpb25fdGVzdEBncHVfdGVzdHMud2ViZ2xfY29uZm9ybWFuY2VfaW50ZWdyYXRpb25fdGVzdC5XZWJHTENvbmZvcm1hbmNlSW50ZWdyYXRpb25UZXN0LldlYmdsQ29uZm9ybWFuY2VfY29uZm9ybWFuY2VfZ2xzbF9idWdzX2xvb3BfaWZfbG9vcF9ncmFkaWVudAw.

Since these tests are still flaky, this issue has been moved back onto the Sheriff Bug Queue if it hasn't already.

If the result above is wrong, please file a bug using this link:
https://bugs.chromium.org/p/chromium/issues/entry?status=Unconfirmed&labels=Pri-1,Test-Findit-Wrong&components=Tools%3ETest%3EFindit%3EFlakiness&summary=%5BFindit%5D%20Flake%20Detection%20-%20Wrong%20result%3A%20gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_conformance_glsl_bugs_loop_if_loop_gradient&comment=Link%20to%20flake%20details%3A%20https://findit-for-me.appspot.com/flake/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyvQELEgVGbGFrZSKxAWNocm9taXVtQHRlbGVtZXRyeV9ncHVfaW50ZWdyYXRpb25fdGVzdEBncHVfdGVzdHMud2ViZ2xfY29uZm9ybWFuY2VfaW50ZWdyYXRpb25fdGVzdC5XZWJHTENvbmZvcm1hbmNlSW50ZWdyYXRpb25UZXN0LldlYmdsQ29uZm9ybWFuY2VfY29uZm9ybWFuY2VfZ2xzbF9idWdzX2xvb3BfaWZfbG9vcF9ncmFkaWVudAw

Automatically posted by the findit-for-me app (https://goo.gl/Ot9f7N).

The failures are mostly happening on the Nexus 5X bot. Example:

https://ci.chromium.org/p/chromium/builders/luci.chromium.try/android-marshmallow-arm64-rel/168097

https://chromium-swarm.appspot.com/task?id=42679f24e7810010&refresh=10&show_raw=1

  Traceback (most recent call last):
    _RunGpuTest at content/test/gpu/gpu_tests/gpu_integration_test.py:155
      self.RunActualGpuTest(url, *args)
    RunActualGpuTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:199
      getattr(self, test_name)(test_path, *args[1:])
    _RunConformanceTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:288
      self._CheckTestCompletion()
    _CheckTestCompletion at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:278
      'webglTestHarness._finished', timeout=self._GetTestTimeout())
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/actions/action_runner.py:263
      return self._tab.WaitForJavaScriptCondition(*args, **kwargs)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/browser/web_contents.py:245
      return self._inspector_backend.WaitForJavaScriptCondition(*args, **kwargs)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:307
      self.GetCurrentConsoleOutputBuffer())
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    Inner at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:41
      inspector_backend._ConvertExceptionFromInspectorWebsocket(e)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    Inner at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:38
      return func(inspector_backend, *args, **kwargs)
    GetCurrentConsoleOutputBuffer at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:196
      return self._console.GetCurrentConsoleOutputBuffer(timeout)
    GetCurrentConsoleOutputBuffer at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_console.py:38
      self._inspector_websocket.DispatchNotifications(timeout)
    DispatchNotifications at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_websocket.py:156
      self._Receive(timeout)
    _Receive at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_websocket.py:181
      raise WebSocketException(err)
  TimeoutException: Timeout after 300s while waiting for JavaScript:webglTestHarness._finished
  
  Exception thrown when trying to capture console output: TimeoutException('',)
  


It looks like the test times out, and then when Telemetry attempts to fetch the console log to display it, that times out, too.

Will mark flaky.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0c1037e8492e6e3c4458c1162657ec6563c5591a

commit 0c1037e8492e6e3c4458c1162657ec6563c5591a
Author: Kenneth Russell <kbr@chromium.org>
Date: Wed Jan 16 03:58:55 2019

Mark loop-if-loop-gradient flaky on Nexus 5X.

conformance/glsl/bugs/loop-if-loop-gradient.html started timing out
intermittently recently on this bot. Unclear why - doubt any software
upgrades were deployed, or any significant upgrades to the shader
translator - so mark flaky to suppress.

Bug: 920737
Change-Id: Ie90c044c3c702e5a0d35736bf4832c9267968bc9
Tbr: ynovikov@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/1413896
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623088}
[modify] https://crrev.com/0c1037e8492e6e3c4458c1162657ec6563c5591a/content/test/gpu/gpu_tests/webgl_conformance_expectations.py

Should be suppressed. Downgrading to P3; will re-upgrade again if flakes persist.