https://luci-milo.appspot.com/buildbot/chromeos/veyron_speedy-paladin/5050


cheets_CTS.com.android.cts.dram failed with broken pipe, might be cause by the recent connectivity issues between duts and shards.

http://cautotest/tko/retrieve_logs.cgi?job=/results/113419035-chromeos-test/



04/19 20:13:01.944 DEBUG|          ssh_host:0284| Running (ssh) '( sleep 1; reboot & sleep 10; reboot -f ) </dev/null >/dev/null 2>&1 & echo -n $!'
04/19 20:13:43.456 ERROR|        base_utils:0280| [stderr] Write failed: Broken pipe
04/19 20:13:43.462 INFO |        server_job:0184| 		ABORT	----	reboot.start	timestamp=1492658023	localtime=Apr 19 20:13:43	reboot command failed
04/19 20:13:43.467 INFO |        server_job:0184| 	END FAIL	----	reboot	timestamp=1492658023	localtime=Apr 19 20:13:43	command execution error
  * Command: 
      /usr/bin/ssh -a -x     -o StrictHostKeyChecking=no -o
      UserKnownHostsFile=/dev/null -o BatchMode=yes -o ConnectTimeout=30 -o
      ServerAliveInterval=900 -o ServerAliveCountMax=3 -o ConnectionAttempts=4
      -o Protocol=2 -l root -p 22 chromeos4-row4-rack11-host4 "export
      LIBC_FATAL_STDERR_=1; if type \"logger\" > /dev/null 2>&1; then logger
      -tag \"autotest\" \"server[stack::run_op|reboot|run_background] ->
      ssh_run(( sleep 1; reboot & sleep 10; reboot -f ) </dev/null >/dev/null
      2>&1 & echo -n \\\$!)\";fi; ( sleep 1; reboot & sleep 10; reboot -f )
      </dev/null >/dev/null 2>&1 & echo -n \$!"
  Exit status: 255
  Duration: 41.4570009708
  
  stderr:
  Write failed: Broken pipe
  Traceback (most recent call last):
    File "/usr/local/autotest/server/server_job.py", line 938, in run_op
      op_func()
    File "/usr/local/autotest/server/hosts/remote.py", line 143, in reboot
      self.run_background(reboot_cmd)
    File "/usr/local/autotest/server/hosts/ssh_host.py", line 328, in run_background
      return self.run(cmd_fmt % command, verbose=verbose).stdout
    File "/usr/local/autotest/server/hosts/ssh_host.py", line 295, in run
      ssh_failure_retry_ok)
    File "/usr/local/autotest/server/hosts/ssh_host.py", line 252, in _run
      raise error.AutoservRunError("command execution error", result)
  AutoservRunError: command execution error
  * Command: 
      /usr/bin/ssh -a -x     -o StrictHostKeyChecking=no -o
      UserKnownHostsFile=/dev/null -o BatchMode=yes -o ConnectTimeout=30 -o
      ServerAliveInterval=900 -o ServerAliveCountMax=3 -o ConnectionAttempts=4
      -o Protocol=2 -l root -p 22 chromeos4-row4-rack11-host4 "export
      LIBC_FATAL_STDERR_=1; if type \"logger\" > /dev/null 2>&1; then logger
      -tag \"autotest\" \"server[stack::run_op|reboot|run_background] ->
      ssh_run(( sleep 1; reboot & sleep 10; reboot -f ) </dev/null >/dev/null
      2>&1 & echo -n \\\$!)\";fi; ( sleep 1; reboot & sleep 10; reboot -f )
      </dev/null >/dev/null 2>&1 & echo -n \$!"
  Exit status: 255
  Duration: 41.4570009708
  
  stderr:
  Write failed: Broken pipe