In chromeos15-row13a-rack3-host10 i am getting below errors which is 

https://ubercautotest.corp.google.com/afe/#tab_id=view_host&object_id=8747

https://paste.googleplex.com/5868757989720064

AutoservRunError: command execution error
* Command: 
    /usr/bin/ssh -a -x  -o ControlPath=/tmp/_autotmp_bSiFP7ssh-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 chromeos15
    -row13a-rack3-host10 "export LIBC_FATAL_STDERR_=1; if type \"logger\" >
    /dev/null 2>&1; then logger -tag \"autotest\"
    \"server[stack::collect_logs|run_on_client|run] ->
    ssh_run(/usr/local/autotest/result_tools/utils.py -p /var/log -m
    20000)\";fi; /usr/local/autotest/result_tools/utils.py -p /var/log -m
    20000"
Exit status: 126
Duration: 0.804832935333

stderr:
bash: /usr/local/autotest/result_tools/utils.py: /usr/bin/python: bad interpreter: No such file or directory
10/03 08:17:21.030 ERROR|             utils:0287| [stderr] bash: /usr/local/autotest/result_tools/utils.py: /usr/bin/python: bad interpreter: No such file or directory
10/03 08:17:21.032 ERROR|            runner:0121| Non-critical failure: Failed to cleanup directory summary for /var/log.
Traceback (most recent call last):
  File "/usr/local/autotest/client/bin/result_tools/runner.py", line 97, in run_on_client
    timeout=_CLEANUP_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_bSiFP7ssh-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 chromeos15
    -row13a-rack3-host10 "export LIBC_FATAL_STDERR_=1; if type \"logger\" >
    /dev/null 2>&1; then logger -tag \"autotest\"
    \"server[stack::collect_logs|run_on_client|run] ->
    ssh_run(/usr/local/autotest/result_tools/utils.py -p /var/log -d)\";fi;
    /usr/local/autotest/result_tools/utils.py -p /var/log -d"
Exit status: 126
Duration: 0.701218128204



-----------------------------
In chromeos15-row13a-rack2-host7 & Host chromeos15-row13b-rack3-host8  I am seeing below error similar to bug 

RootFSUpdateError: Failed to install device image using payload at http://100.90.15.229:8082/update/eve-release/R70-11021.34.0 on chromeos15-row13b-rack5-host2. : command execution error
* Command: 
    /usr/bin/ssh -a -x  -o ControlPath=/tmp/_autotmp_RctnGgssh-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 chromeos15
    -row13b-rack5-host2 "export LIBC_FATAL_STDERR_=1; if type \"logger\" >
    /dev/null 2>&1; then logger -tag \"autotest\"
    \"server[stack::_run|_base_update_handler_no_retry|run] ->
    ssh_run(/usr/bin/update_engine_client --update
    --omaha_url=http://100.90.15.229:8082/update/eve-
    release/R70-11021.34.0)\";fi; /usr/bin/update_engine_client --update
    --omaha_url=http://100.90.15.229:8082/update/eve-release/R70-11021.34.0"
Exit status: 1
Duration: 16.4377510548

stderr:
[1002/220026:INFO:update_engine_client.cc(486)] Forcing an update by setting app_version to ForcedUpdate.
[1002/220026:INFO:update_engine_client.cc(488)] Initiating update check and install.
[1002/220026:INFO:update_engine_client.cc(517)] Waiting for update to complete.
[1002/220040:ERROR:update_engine_client.cc(232)] Update failed, current operation is UPDATE_STATUS_IDLE, last error code is ErrorCode::kOmahaResponseInvalid(34)
10/02 22:02:13.825 ERROR|           control:0074| Provision failed due to Exception.
Traceback (most recent call last):
  File "/usr/local/autotest/results/hosts/chromeos15-row13b-rack5-host2/2483684-provision/20180210202133/control.srv", line 53, in provision_machine
    provision.Provision)
  File "/usr/local/autotest/server/cros/provision.py", line 400, in run_special_task_actions
    task.run_task_actions(job, host, labels)
  File "/usr/local/autotest/server/cros/provision.py", line 173, in run_task_actions
    raise SpecialTaskActionException()
SpecialTaskActionException
10/02 22:02:13.826 ERROR|        server_job:0825| Exception escaped control file, job aborting:
Traceback (most recent call last):
  File "/usr/local/autotest/server/server_job.py", line 817, in run
    self._execute_code(server_control_file, namespace)
  File "/usr/local/autotest/server/server_job.py", line 1340, in _execute_code
    execfile(code_file, namespace, namespace)
  File "/usr/local/autotest/results/hosts/chromeos15-row13b-rack5-host2/2483684-provision/20180210202133/control.srv", line 108, in <module>
    job.parallel_simple(provision_machine, machines)
  File "/usr/local/autotest/server/server_job.py", line 619, in parallel_simple
    log=log, timeout=timeout, return_results=return_results)
  File "/usr/local/autotest/server/subcommand.py", line 98, in parallel_simple
    function(arg)
  File "/usr/local/autotest/results/hosts/chromeos15-row13b-rack5-host2/2483684-provision/20180210202133/control.srv", line 99, in provision_machine
    raise Exception('')

https://paste.googleplex.com/4555855005483008

-----

Seems like they are pointing to devservers which was provisioned in https://bugs.chromium.org/p/chromium/issues/detail?id=889557

Can you please have a look.