Error log info: 
---------------------------------------------------------------------


09/19 07:11:47.947 CRITI|chromiumos_test_pl:0055| ERROR: Failed to install image on the DUT.
09/19 07:19:25.971 ERROR|             utils:0287| [stderr] cat: /tmp/sysinfo/autoserv-qQIsMf/.checksum: No such file or directory
09/19 07:19:41.923 ERROR|             utils:0287| [stderr] bash: /usr/local/autotest/result_tools/utils.py: No such file or directory
09/19 07:19:41.963 ERROR|            runner:0121| Non-critical failure: Failed to create directory summary for /tmp/sysinfo/autoserv-qQIsMf/results/default.
Traceback (most recent call last):
  File "/usr/local/autotest/client/bin/result_tools/runner.py", line 114, in run_on_client
    timeout=_BUILD_DIR_SUMMARY_TIMEOUT)
  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_aKULNSssh-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
    chromeos6-row2-rack21-host10 "export LIBC_FATAL_STDERR_=1; if type
    \"logger\" > /dev/null 2>&1; then logger -tag \"autotest\"
    \"server[stack::collect_client_job_results|run_on_client|run] ->
    ssh_run(/usr/local/autotest/result_tools/utils.py -p /tmp/sysinfo
    /autoserv-qQIsMf/results/default -m 20000)\";fi;
    /usr/local/autotest/result_tools/utils.py -p /tmp/sysinfo/autoserv-
    qQIsMf/results/default -m 20000"
Exit status: 127
Duration: 0.426105976105

stderr:
bash: /usr/local/autotest/result_tools/utils.py: No such file or directory
09/19 07:19:43.402 ERROR|               log:0027| post-test iteration server sysinfo error:
09/19 07:19:43.403 ERROR|         traceback:0013| Traceback (most recent call last):
09/19 07:19:43.403 ERROR|         traceback:0013|   File "/usr/local/autotest/client/common_lib/log.py", line 25, in decorated_func
09/19 07:19:43.403 ERROR|         traceback:0013|     fn(*args, **dargs)
09/19 07:19:43.404 ERROR|         traceback:0013|   File "/usr/local/autotest/server/test.py", line 76, in wrapper
09/19 07:19:43.404 ERROR|         traceback:0013|     func(self, mytest, host, at, outputdir)
09/19 07:19:43.405 ERROR|         traceback:0013|   File "/usr/local/autotest/server/test.py", line 221, in after_iteration_hook
09/19 07:19:43.405 ERROR|         traceback:0013|     results_dir=self.job.resultdir)
09/19 07:19:43.405 ERROR|         traceback:0013|   File "/usr/local/autotest/server/autotest.py", line 479, in run
09/19 07:19:43.406 ERROR|         traceback:0013|     client_disconnect_timeout, use_packaging=use_packaging)
09/19 07:19:43.406 ERROR|         traceback:0013|   File "/usr/local/autotest/server/autotest.py", line 562, in _do_run
09/19 07:19:43.407 ERROR|         traceback:0013|     client_disconnect_timeout=client_disconnect_timeout)
09/19 07:19:43.407 ERROR|         traceback:0013|   File "/usr/local/autotest/server/autotest.py", line 1106, in execute_control
09/19 07:19:43.407 ERROR|         traceback:0013|     raise error.AutotestRunError(msg)
09/19 07:19:43.408 ERROR|         traceback:0013| AutotestRunError: Aborting - unexpected final status message from client on chromeos6-row2-rack21-host10
09/19 07:19:43.408 ERROR|         traceback:0013| 

Ping for update please.

I don't think this is block stable, since manual test confirm it's working. 

Removing the RBS. Thank you.