[AURORA-669] Thermos runner collect_updates() gets stuck in a while loop when timeout is 0

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6.0
• Component/s: Thermos
• Sprint: Aurora Q3 Sprint 2
• Assignee: Brian Wickman
• Reporter: Maxim Khutornenko
• Created: 27/Aug/14 17:49
• Updated: 28/Oct/14 22:38
• Resolved: 15/Sep/14 19:47

Description

The following code in runner.py:collect_update() may result in an infinite while loop when the provided timeout is passed as 0:

 while True:
       ...
        if timeout and total_time >= timeout:
          break
       ...

We have observed a case when the thermos runner gets stuck in a "deadlocked" state not reacting to SIGTERM with the last message in _main_.log as:

D0827 15:35:26.022495 30886 runner.py:856] Run loop: Work to be done within 0.0s