[asterisk-bugs] [JIRA] (ASTERISK-24938) ARI Snoop Channel results in excessive escalating CPU usage

[Asterisk Team (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-24938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Asterisk Team updated ASTERISK-24938:
-------------------------------------

    Target Release Version/s: 14.0.0

> ARI Snoop Channel results in excessive escalating CPU usage
> -----------------------------------------------------------
>
>                 Key: ASTERISK-24938
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24938
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_stasis_snoop
>    Affects Versions: 13.2.0, 13.3.0
>         Environment: Ubuntu Linux 14.04.2, Asterisk built from source, Realtime with MySQL
>            Reporter: George Ladoff
>            Assignee: Kevin Harwell
>      Target Release: 13.4.0, 14.0.0
>
>         Attachments: issue_24938_full_log.txt
>
>
> When I create a Snoop Channel with ARI, the thread immediately begins to consume an additional 2-3% CPU per minute. By about 40 minutes, an entire 3Ghz CPU is consumed. 
> To recreate this, simply have any channel in Stasis then create a Snoop channel from the original channel. CPU usage will start escalating right away.
> I'm specifically creating channels with Spy Out but I've tried both directions and Whisper with the same result.
> This happens every time a Snoop channel is created. The Stasis application and all of the channels are still usable, but only until all of the CPU is consumed. Then of course nothing works. 
> Once the Snoop channel is deleted, the usage goes immediately back to normal (sustained 1-2% per thread). 
> I've tried snooping channels that are using a variety of codecs: ulaw, gsm, g.729. All have the same result. 
> This happens whether the Snoop channel is then bridged or recorded or neither.
> I've tried with both Timerfd and pthread.



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