[asterisk-bugs] [JIRA] (ASTERISK-26861) cdr: Deadlock when setting variables under load

[Alex Hermann (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex Hermann updated ASTERISK-26861:
------------------------------------

    Attachment: 26861-gdb-all-2.txt

This is the CLI and gdb thread list, taskprocessor list and gdb backtraces for all treads. This log is unrelated to the previous as it is from different process. This one stopped early on, so only a "few" threads now.


After the message:
{code}
[Mar 17 17:42:42] WARNING[21518][C-0000019d]: taskprocessor.c:888 taskprocessor_push: The 'subm:cdr_engine-00000003' task processor queue reached 5000 scheduled tasks.
{code}

Everything stopped...


> cdr: Deadlock when setting variables under load
> -----------------------------------------------
>
>                 Key: ASTERISK-26861
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26861
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Functions/func_cdr
>    Affects Versions: 13.14.0
>         Environment: Debian sid
>            Reporter: Alex Hermann
>            Assignee: Alex Hermann
>              Labels: stasis
>         Attachments: 26861-cli-threads.txt, 26861-gdb-all-2.txt, 26861-gdb-bt-30-28043.txt, 26861-gdb-bt-307-29270.txt, 26861-gdb-threads.txt
>
>
> When setting many CDR variables throughout the dialplan, at some point almost all channels/threads will wait on a lock that never gets released. SIP processing stops at that point.
> I don't know if it is relevant, but I set various CDR variables before the Dial command, in the contexts for Dial's 'G' and 'U' options and in the h exten for the master.
> The problem only manifests itself during a bit of call load on the server (as does every deadlock). I can pretty reliable reproduce it within 15k calls at max 50 cps).
> {code}
> CLI> core show taskprocessors
> ...
> subm:cdr_engine-00000003                        11547039      22051       1439       4500       5000
> ...
> {code}
> I'll attach thread list and backtraces.



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