Failure link : 

https://stainless.corp.google.com/search?exclude_retried=true&first_date=2018-10-24&master_builder_name=&builder_name_number=&shard=&exclude_acts=true&builder_name=&master_builder_name_number=&owner=&retry=&exclude_cts=true&exclude_non_production=false&hostname=&board=&branch=&test=%5Ebluetooth_Sanity_DefaultState%24&suite=bluetooth_qualification%7Cbluetooth_chameleon%7Cbluetooth_sanity%7Cbluetooth_stress&build=%5ER72%5C-11258%5C.0%5C.0%24&status=FAIL&status=ERROR&status=ABORT&reason=&waterfall=&exclude_not_run=false&last_date=2018-11-13&exclude_non_release=true&exclude_au=true&model=&view=list

Sample log : 

11/13 13:51:03.357 ERROR|             utils:0287| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
11/13 13:51:09.793 WARNI|             retry:0228| <class 'socket.error'>([Errno 111] Connection refused)
11/13 13:51:09.794 WARNI|             retry:0183| Retrying in 0.802621 seconds...
11/13 13:51:32.976 WARNI|              test:0606| The test failed with the following exception
Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/test.py", line 600, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 800, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 464, in execute
    postprocess_profiled_run, args, dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 371, in _call_run_once
    self.run_once(*args, **dargs)
  File "/usr/local/autotest/server/site_tests/bluetooth_Sanity_DefaultState/bluetooth_Sanity_DefaultState.py", line 137, in run_once
    raise error.TestFail('Bluetooth adapter is connectable')
TestFail: Bluetooth adapter is connectable