Actually, it looks like all tests on that particular device are failing with:


Traceback (most recent call last):
  RunBenchmark at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:364
    benchmark.ShouldTearDownStateAfterEachStorySetRun())
  Run at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:243
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:80
    test.WillRunStory(state.platform)
  WillRunStory at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py:285
    platform.tracing_controller.StartTracing(self._tbm_options.config)
  StartTracing at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/core/tracing_controller.py:43
    self._tracing_controller_backend.StartTracing(tracing_config, timeout)
  StartTracing at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py:91
    started = agent.StartAgentTracing(config, timeout)
  StartAgentTracing at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py:121
    started_startup_tracing = self._StartStartupTracing(config)
  _StartStartupTracing at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py:84
    self._CreateTraceConfigFile(config)
  _CreateTraceConfigFile at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py:263
    self._CreateTraceConfigFileString(config), as_root=True)
  timeout_retry_wrapper at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/decorators.py:57
    retry_if_func=retry_if_func)
  Run at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/utils/timeout_retry.py:159
    error_log_func=error_log_func)
  JoinAll at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/utils/reraiser_thread.py:186
    self._JoinAll(watcher, timeout)
  _JoinAll at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/utils/reraiser_thread.py:158
    thread.ReraiseIfException()
  run at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/utils/reraiser_thread.py:81
    self._ret = self._func(*self._args, **self._kwargs)
  <lambda> at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/utils/timeout_retry.py:152
    child_thread = reraiser_thread.ReraiserThread(lambda: func(*args, **kwargs),
  impl at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/decorators.py:47
    return f(*args, **kwargs)
  WriteFile at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:1650
    self.RunShellCommand(cmd, as_root=as_root, check_return=True)
  timeout_retry_wrapper at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/decorators.py:51
    return impl()
  impl at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/decorators.py:47
    return f(*args, **kwargs)
  RunShellCommand at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:929
    output = handle_large_output(cmd, large_output)
  handle_large_output at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:904
    return handle_large_command(cmd)
  handle_large_command at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:886
    return handle_check_return(cmd)
  handle_check_return at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:877
    return run(cmd)
  run at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/device_utils.py:873
    return self.adb.Shell(cmd)
  Shell at /b/c/b/Android_Nexus5X_Perf__3_/src/third_party/catapult/devil/devil/android/sdk/adb_wrapper.py:496
    command, output, status=status, device_serial=self._device_serial)
AdbShellCommandFailedError: (device: 00cafdbc3e83d370) shell command run via adb failed on the device:
  command: echo -n '{"trace_config": {"excluded_categories": ["*"], "included_categories": ["v8", "webkit.console", "renderer.scheduler", "blink.console", "disabled-by-default-memory-infra"], "memory_dump_config": {"triggers": []}, "record_mode": "record-as-much-as-possible"}}' > /data/local/chrome-trace-config.json
  exit status: 1
  output:
  - /system/bin/sh: can't create /data/local/chrome-trace-config.json: Permission denied


Zhenw@, do you know anything about this error when trying to write the chrome trace config file?

Does that device has root access?

Nope, according to provision devices it is the one device that isn't rooted. Routing to HWOps. 

C   38.924s ProvisionDevice(00cafdbc3e83d370)  (TimeoutThread-1-for-ProvisionDevice(00cafdbc3e83d370)) Exception on EnableRoot(00cafdbc3e83d370, retries=3, timeout=30), attempt 1 of 4: CommandFailedError('(device: 00cafdbc3e83d370) Cannot enable root in user builds.',)


The device with id 00cafdbc3e83d370 on build57-b1 needs to be flashed with a rooted version.

Thanks for the help Zhen!

Fixed.  I wonder how this happened?

Checking 00706ba5898326e4....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00497c1989bb1ee6....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00e2164b278fb20b....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00b88e248060cd28....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00b675f2273fbc0b....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00b3512549c11418....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys
Checking 00cafdbc3e83d370....
bullhead-userdebug 6.0 MDB08O 2379248 dev-keys