https://uberchromegw.corp.google.com/i/chromeos/builders/arkham-release/builds/772/steps/AUTest%20%5Bau%5D/logs/stdio

I am copying the entire log here.  I don't see any clue as to why no test configurations were generated.

@@@BUILD_STEP@AUTest [au]@@@
************************************************************
@@@STEP_LINK@stdout-->stdio@https://luci-logdog.appspot.com/v/?s=chromeos%2Fbb%2Fchromeos%2Farkham-release%2F772%2F%2B%2Frecipes%2Fsteps%2FAUTest__au_%2F0%2Fstdout@@@
** Start Stage AUTest [au] - Wed, 18 Jan 2017 03:07:15 -0800 (PST)
** 
** Stage for au hw test suites that requires special pre-processing.
************************************************************
03:07:15: INFO: Created cidb engine bot@173.194.81.53 for pid 27736
03:07:15: INFO: Running cidb query on pid 27736, repr(query) starts with <sqlalchemy.sql.expression.Update object at 0x7ff3df2c4ad0>
03:07:16: INFO: Waiting up to forever for payloads and test artifacts ...
Preconditions for the stage successfully met. Beginning to execute stage...
03:07:16: INFO: Running cidb query on pid 27736, repr(query) starts with <sqlalchemy.sql.expression.Update object at 0x7ff3df2cf150>
03:07:16: INFO: RunCommand: site_utils/autoupdate/full_release_test.py --npo --nmo --dump --dump_dir /tmp/cbuildbot-tmppobNum/tmpdw4Zbz/autotest/au_control_files --archive_url gs://chromeos-image-archive/arkham-release/R57-9196.0.0 9196.0.0 arkham '--log=debug' in /b/cbuild/internal_master/src/third_party/autotest/files
CRITICAL:root:no test configurations generated, nothing to do

@@@STEP_FAILURE@@@
03:07:24: ERROR: Traceback (most recent call last):
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/generic_stages.py", line 606, in Run
    self.PerformStage()
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/test_stages.py", line 420, in PerformStage
    self.version, self.upload_url)
  File "/b/cbuild/internal_master/chromite/cbuildbot/commands.py", line 2069, in BuildAUTestTarball
    cros_build_lib.RunCommand(cmd, env=run_env, cwd=cwd)
  File "/b/cbuild/internal_master/chromite/lib/cros_build_lib.py", line 625, in RunCommand
    raise RunCommandError(msg, cmd_result)
RunCommandError: return code: 1; command: site_utils/autoupdate/full_release_test.py --npo --nmo --dump --dump_dir /tmp/cbuildbot-tmppobNum/tmpdw4Zbz/autotest/au_control_files --archive_url gs://chromeos-image-archive/arkham-release/R57-9196.0.0 9196.0.0 arkham '--log=debug'
cmd=['site_utils/autoupdate/full_release_test.py', '--npo', '--nmo', '--dump', '--dump_dir', '/tmp/cbuildbot-tmppobNum/tmpdw4Zbz/autotest/au_control_files', '--archive_url', 'gs://chromeos-image-archive/arkham-release/R57-9196.0.0', '9196.0.0', 'arkham', '--log=debug'], cwd=/b/cbuild/internal_master/src/third_party/autotest/files

03:07:24: INFO: Running cidb query on pid 27736, repr(query) starts with <sqlalchemy.sql.expression.Update object at 0x7ff3dfaad510>
03:07:24: INFO: Running cidb query on pid 27736, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x7ff3dfaad890>
************************************************************
** Finished Stage AUTest [au] - Wed, 18 Jan 2017 03:07:24 -0800 (PST)
************************************************************
03:07:25: ERROR: BaseException in _RunParallelStages <class 'chromite.lib.failures_lib.StepFailure'>: 
Traceback (most recent call last):
  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/stages/generic_stages.py", line 625, in Run
    raise failures_lib.StepFailure()
StepFailure
Traceback (most recent call last):
  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 678, in RunParallelSteps
    return [queue.get_nowait() for queue in queues]
  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 561, in ParallelTasks
    raise BackgroundFailure(exc_infos=errors)
BackgroundFailure: <class 'chromite.lib.failures_lib.StepFailure'>: 
Traceback (most recent call last):
  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/stages/generic_stages.py", line 625, in Run
    raise failures_lib.StepFailure()
StepFailure

03:07:25: INFO: Running cidb query on pid 14453, repr(query) starts with <sqlalchemy.sql.expression.Select at 0x7ff3df2e3b10; Select object>
03:07:25: INFO: Running cidb query on pid 14453, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x7ff3df2e3c90>
03:07:25: INFO: Running cidb query on pid 14453, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x7ff3df2e3d10>
03:07:25: INFO: Running cidb query on pid 14453, repr(query) starts with <sqlalchemy.sql.expression.Select at 0x7ff3df2e3cd0; Select object>
03:38:49: INFO: Running cidb query on pid 7183, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x7ff3e5314090>
03:38:54: INFO: cidb query succeeded after 1 retries