[asterisk-bugs] [JIRA] (ASTERISK-24540) Presence Causes Deadlock

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-24540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=224946#comment-224946 ] 

Matt Jordan commented on ASTERISK-24540:
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That being said: was there an actual locking issue? Or was this merely the database lookups impeding progress?

(Also note that {{chan_pjsip}}, being multi-threaded in the stack, won't block subsequent requests well a DB transaction is taking place.)

> Presence Causes Deadlock
> ------------------------
>
>                 Key: ASTERISK-24540
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24540
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: 1.8.32.0, 11.14.0, 11.14.1, 13.2.0
>         Environment: CentOS 6.4, CentOS 6.5, CentOS 7
>            Reporter: Ross Beer
>            Assignee: Ross Beer
>         Attachments: backtrace-threads_21-11-2014-clean.txt, backtrace-threads-clean_server2.txt, backtrace-threads-clean.txt, lsof_24-11-2014_1158.txt, server2_additional_debug.txt, threads.txt
>
>
> We are experiencing an issue where the SIP channel driver pauses and does not allow further registrations or calls to progress.
> Looking at core dumps shows lock waits for app_dial and presence.
> Unfortunately asterisk had not been compiled with the correct settings so I will need to provide further back traces when the issue happens again, however have attached the files I have now.



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