From harpreet:

While debugging Chaos lab (wifi interop lab) test failures I found that the test were failing due to the following exception when create_host is called in chaos_runner.py.

10/27 02:22:04.118 ERROR|        server_job:0864| Exception escaped control file, job aborting:
Traceback (most recent call last):
  File "/usr/local/autotest/server/server_job.py", line 856, in run
    self._execute_code(server_control_file, namespace)
  File "/usr/local/autotest/server/server_job.py", line 1357, in _execute_code
    execfile(code_file, namespace, namespace)
  File "/usr/local/autotest/results/151915883-chromeos-test/control.srv", line 36, in <module>
    parallel_simple(run_chaos_open, machines)
  File "/usr/local/autotest/server/subcommand.py", line 98, in parallel_simple
    function(arg)
  File "/usr/local/autotest/results/151915883-chromeos-test/control.srv", line 33, in run_chaos_open
    runner.run(job)
  File "/usr/local/autotest/server/cros/chaos_lib/chaos_runner.py", line 163, in run
    host_class=self._host.__class__),
  File "/usr/local/autotest/server/hosts/factory.py", line 172, in create_host
    detected_args = _get_host_arguments(machine)
  File "/usr/local/autotest/server/hosts/factory.py", line 68, in _get_host_arguments
    host_info_store = host_info.get_store_from_machine(machine)
  File "/usr/local/autotest/server/hosts/host_info.py", line 330, in get_store_from_machine
    return machine['host_info_store']
KeyError: 'host_info_store'

I noticed that if we pass just the hostname as a string when calling create_host, this error is not seen. So I submitted this CL to get the test to successfully create the host though the real issue lies elsewhere. I see that you had added a function to extract host_info_store from machine and this is exactly where the above exception happens. I am going to revert the CL I submitted as afe_host info is needed in the test setup. Could you please take a look at why the above exception is happening? Here is an example autoserv debug log from the test that ran before my CL.