tricky-chrome-pfq failed last night on HWTest [sanity]:

https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/buildDetails?id=3284873

https://luci-logdog.appspot.com/logs/chromeos/buildbucket/cr-buildbucket.appspot.com/8925917399675732544/+/steps/HWTest__sanity_/0/stdout

01:07:45: WARNING: Exception is not retriable return code: 3; command: /b/swarming/wyPJZSD/ir/cache/cbuild/repository/chromite/third_party/swarming.client/swarming.py run --[etc]
Triggered task: tricky-chrome-pfq/R73-11481.0.0-rc1-sanity
chromeos-golo-server2-92: 420cdb7c843e0c10 3
  Autotest instance created: cautotest-prod
  12-28-2018 [00:59:10] Created suite job: http://cautotest-prod/afe/#tab_id=view_job&object_id=271348045
  @@@STEP_LINK@Link to suite@http://cautotest-prod/afe/#tab_id=view_job&object_id=271348045@@@
  12-28-2018 [01:07:05] Suite job is finished.
  12-28-2018 [01:07:05] Start collecting test results and dump them to json.
  Suite job   [ PASSED ]
  provision   [ FAILED ]
  provision     FAIL: Download and install failed from chromeos4-devserver5.cros.corp.google.com onto chromeos4-row2-rack4-host15: command execution error


From the provision_AutoUpdate.ERROR log in
https://stainless.corp.google.com/browse/chromeos-autotest-results/271348205-chromeos-test/ :

12/28 01:01:07.047 ERROR|             utils:0287| [stderr] [1227/235737:INFO:update_engine_client.cc(508)] Querying Update Engine status...
12/28 01:01:29.273 ERROR|             utils:0287| [stderr] cat: /tmp/sysinfo/autoserv-3fnhDK/.checksum: No such file or directory
12/28 01:03:14.281 ERROR|             utils:0287| [stderr] mux_client_request_session: read from master failed: Broken pipe
12/28 01:03:20.107 ERROR|             utils:0287| [stderr] [1228/010319:INFO:update_engine_client.cc(508)] Querying Update Engine status...
12/28 01:04:27.382 ERROR|       autoupdater:0889| quick-provision script failed; will fall back to update_engine.
Traceback (most recent call last):
  File "/usr/local/autotest/server/cros/autoupdater.py", line 882, in _install_via_quick_provision
    self._run(command)
  File "/usr/local/autotest/server/cros/autoupdater.py", line 356, in _run
    return self.host.run(cmd, *args, **kwargs)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 335, in run
    return self.run_very_slowly(*args, **kwargs)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 324, in run_very_slowly
    ssh_failure_retry_ok)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 268, in _run
    raise error.AutoservRunError("command execution error", result)
AutoservRunError: command execution error
* Command: 
    /usr/bin/ssh -a -x  -o ControlPath=/tmp/_autotmp_wQLndDssh-master/socket
    -o Protocol=2 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null
    -o BatchMode=yes -o ConnectTimeout=30 -o ServerAliveInterval=900 -o
    ServerAliveCountMax=3 -o ConnectionAttempts=4 -l root -p 22
    chromeos4-row2-rack4-host15 "export LIBC_FATAL_STDERR_=1; if type
    \"logger\" > /dev/null 2>&1; then logger -tag \"autotest\"
    \"server[stack::_install_via_quick_provision|_run|run] ->
    ssh_run(/bin/bash /tmp/quick-provision --noreboot tricky-chrome-
    pfq/R73-11481.0.0-rc1 http://100.115.219.133:8082/static)\";fi; /bin/bash
    /tmp/quick-provision --noreboot tricky-chrome-pfq/R73-11481.0.0-rc1
    http://100.115.219.133:8082/static"
Exit status: 1
Duration: 65.7212760448


Assigning to hardware deputy pprabhu@ (who also owns  Issue 882152 , which has the same traceback for a failure in_install_via_quick_provision).