[asterisk-dev] [Code Review] Fix FRACK message caused by chan_iax2

[Tilghman Lesher]

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This is an automatically generated e-mail. To reply, visit:
https://reviewboard.asterisk.org/r/861/
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(Updated 2010-08-13 12:35:52.235773)


Review request for Asterisk Developers.


Summary
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The FRACK message out of the scheduler indicates that we attempted to cancel an ID that does not exist.  This usually indicates a race condition.

What I've found is that due to the way that we schedule multiple threads in chan_iax2 to run scheduled tasks, there can be an extended period of time that a scheduled task has been successfully run by the scheduler, yet the task has not actually run, and therefore, has not altered the stored scheduler ID.  When teardown attempts to cancel all scheduled tasks, the scheduler complains and shortly thereafter, the task complains that the callno does not exist.


Diffs (updated)
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  /branches/1.8/channels/chan_iax2.c 282013 
  /branches/1.8/include/asterisk/sched.h 282013 

Diff: https://reviewboard.asterisk.org/r/861/diff


Testing
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Since this is a race condition, it's difficult to test.  However, I have run with this patch for extended periods (i.e. overnight) that would have previously caused the FRACK message to appear several times, and the FRACK message did not appear.


Thanks,

Tilghman