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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/3368/">https://reviewboard.asterisk.org/r/3368/</a>
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<div>Review request for Asterisk Developers.</div>
<div>By one47.</div>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-22079">ASTERISK-22079</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">As requested, here is a workaround (not a fix) for the SIP SEGV caused by a scheduler race condition.
If a provisional keepalive is simultaneously rescheduled/cancelled, and executed by 2 parallel threads, then a scheduled event can be leaked.
The correct fix will probably involve a re-factoring of the scheduler so that a scheduled-job-reference is held by the owner, rather than just a scheduled-job-id as at present. That is outside the scope of this fix, which simply re-checks that the scheduler-id is unchanged after the lock has been obtained when running the scheduled job.
There is probably scope for doing this is several other scheduled function calls.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Run on live server for several weeks.
Tested on load-test environment with following dialplan, which previously caused a crash in < 30 mins at 1 call per second.
exten => 900,1,NoOp(Crash Generator)
same => n,Ringing
same => n,Wait(60)
same => n,Progress
same => n,Hangup</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<p><a href="https://reviewboard.asterisk.org/r/3368/diff/" style="margin-left: 3em;">View Diff</a></p>
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