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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2878/">https://reviewboard.asterisk.org/r/2878/</a>
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<p>Ship it!</p>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Ship It!</pre>
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<p>- Mark</p>
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<p>On September 24th, 2013, 9:49 p.m. UTC, Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers and Mark Michelson.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated Sept. 24, 2013, 9:49 p.m.</i></p>
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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-22507">ASTERISK-22507</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;">app_queue does an admirable job of attempting to manage the Lovecraftian nightmare that are Local channel optimizations. Sometimes, however, even it can't defeat the horror.
Consider the following scenario:
SIP/foo <-> L;1 <-> L;2 <-> SIP/agent
SIP/agent answers, triggering a Local channel optimization. This is fine - app_queue will normally do the following:
* Listen for the Local optimization events and update our agent accordingly to SIP/agent
* When we get a hangup, publish the AgentComplete event based on our information (SIP/foo and SIP/agent)
However, as with all things that depend on sanity from something as capricious as Local channels, things can go wrong:
(1) SIP/agent immediately hangs up upon answering, because "customer service is our #1 priority" doesn't apply on casual Fridays
(2) Asterisk is either (a) Running under valgrind; (b) Running under gdb; (c) Running on Richard's dev machine/some other ancient piece of equipment that should have been put out of its misery ages ago
In that case, the messages *may* arrive to app_queue in the following order:
* Hangup SIP/Agent
* Hangup SIP/foo
* Optimize L;1/L;2
* Hangup L;2
* Hangup L;1
When we receive the hangup of the agent or the caller, we'll attempt to publish the AgentComplete event. However, we now have a problem - we think our agent is L;1. We haven't received the optimization messages - but L;1 is already dead, so any attempts to query it from the Stasis cache result in a big fat NULL.
There are two options here:
(1) If we can't retrieve channel information, bail
(2) If we can't retrieve channel information, publish what we know
This patch goes with option #2. We still have a lot of pertinent queue information (interface, queue name, etc.) - and we may as well tell the user what we know. They will still at least get the "AgentComplete" event, which "completes" the known Agent information.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>./branches/12/apps/app_queue.c <span style="color: grey">(399746)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2878/diff/" style="margin-left: 3em;">View Diff</a></p>
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