[asterisk-bugs] [JIRA] (ASTERISK-21916) Call hangs when FILTER function is used in dial plan

[Elizabeth Hudnott (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=208343#comment-208343 ] 

Elizabeth Hudnott commented on ASTERISK-21916:
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Not sure why I'd need a space after the >.  I don't usually put one there when I redirect output in Linux and have never had any problems before.

pidof asterisk gives a list of numbers, e.g. "31272 31271"...  Yes, there are 23 processes on my system named asterisk, all created from the same "asterisk" command invocation (without the quotes).  I assumed all bar one of them were just folked background processes created by the main one?

I don't know if this helps, but I'll mention anyway that I don't think there's any timer available on this system.  (I don't know why a simple filter function would need a timer or indeed any non-local resources but...).  I now remember that when I first installed the system I had to noload res_timing_pthread because initially the asterisk process(es) were dying every time a SIP call connected.  The system's been rebooted since then.  (Is there a bug report about that somewhere?  I don't see anything obvious.  Other people in blogs and forums have described the same issue in their router firmware environments.)
                
> Call hangs when FILTER function is used in dial plan
> ----------------------------------------------------
>
>                 Key: ASTERISK-21916
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21916
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Functions/func_strings
>    Affects Versions: 11.4.0
>         Environment: Latest binaries of Asterisk 11.4.0 from Optware repository running on an Asus RT-n66u (Tomato USB based router, MIPS 74K V4.9) with firmware 3.0.0.4.270.25 (rmerlin variant) and Linux 2.6.22.19, installed on an ext3 partition on external HD
>            Reporter: Elizabeth Hudnott
>            Assignee: Elizabeth Hudnott
>            Severity: Critical
>         Attachments: debug.log
>
>
> Whenever the FILTER function is used in the dial plan the call hangs.  No further dial plan steps get executed, ringing tone ceases, the call remains open until Asterisk is restarted and CPU utilization increases sharply.
> Simple dial plan extract to reproduce the problem:
> {noformat}
> exten=>**4,1,Verbose(${FILTER(0-9,123)})
> same=>n,Hangup()
> {noformat}
> This behaviour occurs consistently every time the extension is dialled from CSipSimple sofphone.

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