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[Bug 1513771] [NEW] functional tests random failure on TestProcessMonitor.test_respawn_handler trying to kill a process

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Public bug reported:

2015-11-06 08:16:42.407 | 2015-11-06 08:16:42.364 | ==============================
2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.366 | Failed 1 tests - output below:
2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.367 | ==============================
2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.369 | 
2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.370 | neutron.tests.functional.agent.linux.test_process_monitor.TestProcessMonitor.test_respawn_handler
2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.372 | -------------------------------------------------------------------------------------------------
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.373 | 
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.374 | Captured traceback:
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.376 | ~~~~~~~~~~~~~~~~~~~
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.377 |     Traceback (most recent call last):
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.378 |       File "neutron/tests/functional/agent/linux/test_process_monitor.py", line 108, in test_respawn_handler
2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.380 |         self._kill_last_child()
2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.381 |       File "neutron/tests/functional/agent/linux/test_process_monitor.py", line 77, in _kill_last_child
2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.383 |         self._child_processes[-1].disable()
2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.385 |       File "neutron/agent/linux/external_process.py", line 109, in disable
2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.386 |         utils.execute(cmd, run_as_root=True)
2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.388 |       File "neutron/agent/linux/utils.py", line 159, in execute
2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.389 |         raise RuntimeError(m)
2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.391 |     RuntimeError: 
2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.393 |     Command: ['sudo', 'kill', '-9', 'None']
2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.394 |     Exit code: 1
2015-11-06 08:16:42.413 | 2015-11-06 08:16:42.396 |     Stdin: 
2015-11-06 08:16:42.415 | 2015-11-06 08:16:42.397 |     Stdout: 
2015-11-06 08:16:42.416 | 2015-11-06 08:16:42.399 |     Stderr: kill: failed to parse argument: 'None'
2015-11-06 08:16:42.418 | 2015-11-06 08:16:42.400 |     
2015-11-06 08:16:42.419 | 2015-11-06 08:16:42.402 |     
2015-11-06 08:16:42.440 | 2015-11-06 08:16:42.403 | 
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.405 | Captured pythonlogging:
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.407 | ~~~~~~~~~~~~~~~~~~~~~~~
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.408 |     2015-11-06 08:14:13,232    ERROR [neutron.agent.linux.utils] Unable to convert value in /tmp/tmpPzSZY1/tmpLtA4wt/external/pids/test-uuid-1.pid
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.410 |     2015-11-06 08:14:13,243    ERROR [neutron.agent.linux.utils] 
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.411 |     Command: ['sudo', 'kill', '-9', 'None']
2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.413 |     Exit code: 1
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.414 |     Stdin: 
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.416 |     Stdout: 
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.418 |     Stderr: kill: failed to parse argument: 'None'
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.420 |     
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.421 |     
2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.423 | 
2015-11-06 08:16:42.443 | 2015-11-06 08:16:42.425 |

** Affects: neutron
     Importance: Low
     Assignee: Miguel Angel Ajo (mangelajo)
         Status: New


** Tags: functional-tests

** Changed in: neutron
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1513771

Title:
  functional tests random failure on
  TestProcessMonitor.test_respawn_handler trying to kill a process

Status in neutron:
  New

Bug description:
  2015-11-06 08:16:42.407 | 2015-11-06 08:16:42.364 | ==============================
  2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.366 | Failed 1 tests - output below:
  2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.367 | ==============================
  2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.369 | 
  2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.370 | neutron.tests.functional.agent.linux.test_process_monitor.TestProcessMonitor.test_respawn_handler
  2015-11-06 08:16:42.408 | 2015-11-06 08:16:42.372 | -------------------------------------------------------------------------------------------------
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.373 | 
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.374 | Captured traceback:
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.376 | ~~~~~~~~~~~~~~~~~~~
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.377 |     Traceback (most recent call last):
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.378 |       File "neutron/tests/functional/agent/linux/test_process_monitor.py", line 108, in test_respawn_handler
  2015-11-06 08:16:42.409 | 2015-11-06 08:16:42.380 |         self._kill_last_child()
  2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.381 |       File "neutron/tests/functional/agent/linux/test_process_monitor.py", line 77, in _kill_last_child
  2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.383 |         self._child_processes[-1].disable()
  2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.385 |       File "neutron/agent/linux/external_process.py", line 109, in disable
  2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.386 |         utils.execute(cmd, run_as_root=True)
  2015-11-06 08:16:42.410 | 2015-11-06 08:16:42.388 |       File "neutron/agent/linux/utils.py", line 159, in execute
  2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.389 |         raise RuntimeError(m)
  2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.391 |     RuntimeError: 
  2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.393 |     Command: ['sudo', 'kill', '-9', 'None']
  2015-11-06 08:16:42.411 | 2015-11-06 08:16:42.394 |     Exit code: 1
  2015-11-06 08:16:42.413 | 2015-11-06 08:16:42.396 |     Stdin: 
  2015-11-06 08:16:42.415 | 2015-11-06 08:16:42.397 |     Stdout: 
  2015-11-06 08:16:42.416 | 2015-11-06 08:16:42.399 |     Stderr: kill: failed to parse argument: 'None'
  2015-11-06 08:16:42.418 | 2015-11-06 08:16:42.400 |     
  2015-11-06 08:16:42.419 | 2015-11-06 08:16:42.402 |     
  2015-11-06 08:16:42.440 | 2015-11-06 08:16:42.403 | 
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.405 | Captured pythonlogging:
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.407 | ~~~~~~~~~~~~~~~~~~~~~~~
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.408 |     2015-11-06 08:14:13,232    ERROR [neutron.agent.linux.utils] Unable to convert value in /tmp/tmpPzSZY1/tmpLtA4wt/external/pids/test-uuid-1.pid
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.410 |     2015-11-06 08:14:13,243    ERROR [neutron.agent.linux.utils] 
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.411 |     Command: ['sudo', 'kill', '-9', 'None']
  2015-11-06 08:16:42.441 | 2015-11-06 08:16:42.413 |     Exit code: 1
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.414 |     Stdin: 
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.416 |     Stdout: 
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.418 |     Stderr: kill: failed to parse argument: 'None'
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.420 |     
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.421 |     
  2015-11-06 08:16:42.442 | 2015-11-06 08:16:42.423 | 
  2015-11-06 08:16:42.443 | 2015-11-06 08:16:42.425 |

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