https://uberchromegw.corp.google.com/i/chromeos/builders/daisy_spring-release/builds/1926/steps/HWTest%20%5Bbvt-inline%5D/logs/stdio

@@@STEP_FAILURE@@@
08:48:39: WARNING: No output from <_BackgroundTask(_BackgroundTask-7:7:4, started)> for 8640 seconds
  File "chromite/bin/cbuildbot", line 168, in <module>
    DoMain()
  File "chromite/bin/cbuildbot", line 164, in DoMain
    commandline.ScriptWrapperMain(FindTarget)
  File "/b/cbuild/internal_master/chromite/lib/commandline.py", line 834, in ScriptWrapperMain
    ret = target(argv[1:])
  File "/b/cbuild/internal_master/chromite/scripts/cbuildbot.py", line 1307, in main
    _RunBuildStagesWrapper(options, site_config, build_config)
  File "/b/cbuild/internal_master/chromite/scripts/cbuildbot.py", line 248, in _RunBuildStagesWrapper
    if not builder.Run():
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/generic_builders.py", line 316, in Run
    self.RunStages()
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 474, in RunStages
    super(DistributedBuilder, self).RunStages()
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 334, in RunStages
    self._RunDefaultTypeBuild()
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 321, in _RunDefaultTypeBuild
    self.RunBuildStages()
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 282, in RunBuildStages
    with parallel.BackgroundTaskRunner(task_runner) as queue:
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 745, in BackgroundTaskRunner
    with _BackgroundTask.ParallelTasks(steps, halt_on_error=halt_on_error):
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 532, in ParallelTasks
    task.start()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 388, in start
    return multiprocessing.Process.start(self)
  File "/usr/lib/python2.7/multiprocessing/process.py", line 130, in start
    self._popen = Popen(self)
  File "/usr/lib/python2.7/multiprocessing/forking.py", line 126, in __init__
    code = process_obj._bootstrap()
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 399, in run
    errors = self._Run()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 441, in _Run
    self._task(*self._task_args, **self._task_kwargs)
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 602, in TaskRunner
    task(*x, **task_kwargs)
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 128, in _RunBackgroundStagesForBoardAndMarkAsSuccessful
    self._RunBackgroundStagesForBoard(builder_run, board)
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 220, in _RunBackgroundStagesForBoard
    lambda: self._RunHWTests(builder_run, board),
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 674, in RunParallelSteps
    halt_on_error=halt_on_error):
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 532, in ParallelTasks
    task.start()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 388, in start
    return multiprocessing.Process.start(self)
  File "/usr/lib/python2.7/multiprocessing/process.py", line 130, in start
    self._popen = Popen(self)
  File "/usr/lib/python2.7/multiprocessing/forking.py", line 126, in __init__
    code = process_obj._bootstrap()
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 399, in run
    errors = self._Run()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 441, in _Run
    self._task(*self._task_args, **self._task_kwargs)
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 220, in <lambda>
    lambda: self._RunHWTests(builder_run, board),
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/simple_builders.py", line 112, in _RunHWTests
    self._RunParallelStages(parallel_stages)
  File "/b/cbuild/internal_master/chromite/cbuildbot/builders/generic_builders.py", line 118, in _RunParallelStages
    parallel.RunParallelSteps(steps)
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 675, in RunParallelSteps
    pass
  File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
    self.gen.next()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 546, in ParallelTasks
    task_errors = task.Wait()
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 363, in Wait
    traceback.print_stack()



Assigning it to pprabhu@ since you looked at a similar bug. Please re-assign if someone else is the right owner.