[asterisk-bugs] [JIRA] (ASTERISK-25839) "Expected to acknowledge ticks" problem

[David Cunningham (JIRA)]

David Cunningham created ASTERISK-25839:
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             Summary: "Expected to acknowledge ticks" problem
                 Key: ASTERISK-25839
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25839
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 11.21.2
         Environment: Debian 7.6, 64 bit
            Reporter: David Cunningham
            Severity: Critical


We are seeing an issue where a call will be "stuck" for roughly a minute or so and the Asterisk log gives many "Expected to acknowledge ticks" warnings as below. This is causing severe issues for a customer running a call centre. The system is running 11.21.2.
Can you advise of the cause? Thank you.

[Mar 10 08:00:25] DEBUG[3158][C-0000273f] channel.c: Set channel Local/4171411 at product-phone-0000217b;2 to write format slin
[Mar 10 08:00:25] DEBUG[3158][C-0000273f] res_musiconhold.c: Local/4171411 at product-phone-0000217b;2 Opened file 0 '/var/lib/product/music/2/2/1'
[Mar 10 08:00:25] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Difference is 888, ms is 131
[Mar 10 08:00:25] DEBUG[3158][C-0000273f] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 4 instead
[Mar 10 08:00:30] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Got RTCP report of 76 bytes
[Mar 10 08:00:30] DEBUG[3158][C-0000273f] res_musiconhold.c: Local/4171411 at product-phone-0000217b;2 Opened file 0 '/var/lib/product/music/2/2/1'
[Mar 10 08:00:30] DEBUG[3158][C-0000273f] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 4 instead
[Mar 10 08:00:30] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Difference is 752, ms is 114
[Mar 10 08:00:32] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Got RTCP report of 76 bytes
[Mar 10 08:00:35] DEBUG[3158][C-0000273f] res_musiconhold.c: Local/4171411 at product-phone-0000217b;2 Opened file 0 '/var/lib/product/music/2/2/1'
[Mar 10 08:00:35] DEBUG[3158][C-0000273f] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 5 instead
[Mar 10 08:00:35] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Difference is 824, ms is 123
[Mar 10 08:00:36] DEBUG[3146][C-0000273f] res_rtp_asterisk.c: Got RTCP report of 76 bytes
[Mar 10 08:00:40] DEBUG[3158][C-0000273f] res_musiconhold.c: Local/4171411 at product-phone-0000217b;2 Opened file 0 '/var/lib/product/music/2/2/1'
[Mar 10 08:00:40] DEBUG[3158][C-0000273f] res_timing_timerfd.c: Expected to acknowledge 1 ticks but got 4 instead



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