2018-04-25 10:20:26,580 - INFO [Worker,0 Main service::run] Worker 0 up and run$
2018-04-25 10:20:26,701 - INFO [Worker,0 2 rpc::initialize] Established connect$
2018-04-25 10:20:26,900 - INFO [Worker,0 3 rpc::initialize] Established connect$
2018-04-25 10:22:23,255 - INFO [Worker,0 4 Worker::execute_job_group] Starting $
2018-04-25 10:22:23,256 - INFO [Worker,0 4 Worker::execute_job_group] [compile $
2018-04-25 10:22:23,273 - ERROR [Worker,0 4 Worker::execute_job_group] Worker f$
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/cms-1.3.1-py2.7.egg/cms/service/$
    task_type.execute_job(job, self.file_cacher)
  File "/usr/local/lib/python2.7/dist-packages/cms-1.3.1-py2.7.egg/cms/grading/$
    self.compile(job, file_cacher)
  File "/usr/local/lib/python2.7/dist-packages/cms-1.3.1-py2.7.egg/cms/grading/$
    sandbox = create_sandbox(file_cacher, job.multithreaded_sandbox)
  File "/usr/local/lib/python2.7/dist-packages/cms-1.3.1-py2.7.egg/cms/grading/$
    sandbox = Sandbox(multithreaded, file_cacher)
  File "/usr/local/lib/python2.7/dist-packages/cms-1.3.1-py2.7.egg/cms/grading/$
    "(error %d)" % (pretty_print_cmdline(box_cmd), ret))
SandboxInterfaceException: Failed to initialize sandbox with command: 'isolate'$
2018-04-25 10:22:23,274 - INFO [Worker,0 4 Worker::_finalize] Executed in 0.018$