[Freeswitch-users] PRI channels get stuck in HANGUP state.

Sat Feb 7 02:50:26 MSK 2015

Thomas:

I haven't seen this exact issue before, but I have had problems with
glare on our PRI.  Since calls come in starting on the first channel
you should bridge outgoing calls starting with channel 23:
http://wiki.freeswitch.org/wiki/FreeTDM#Ascending_vs._Descending_Channel_Selection

Also consider enabling the trace feature so you can see what is
actually being sent and received on the PRI:
http://wiki.sangoma.com/Freeswitch-FreeTDM-Sangoma-ISDN-Library#q931-trace

Again, this might not be the resolution to your issue but hopefully it
helps point you in the right direction.

~Brian

On Tue, Feb 3, 2015 at 4:45 PM, Thomas Johnson <tommyj27 at gmail.com> wrote:
> I am trying to track down an issue where FreeTDM seems to get confused about
> the state of channels on my PRI. The state seems to occur on origination;
> FreeTDM opens a channel, and immediately closes it, logging
> REQUESTED_CHAN_UNAVAIL. The channel then sits in the HANGUP state,
> preventing inbound calls and logging the following error.
>
> 2015-02-03 08:25:04.774438 [ERR] ftmod_libpri.c:1883 [s1c1][1:1] -- Selected
> channel is already in use
>
> I can resolve this by restarting Freeswitch, but it is obviously
> less-than-ideal. A bit of relevant logging is at the end of this message. It
> seems to occur immediately after a hangup on the same channel; could I be
> triggering a race condition?
>
> https://freeswitch.org/jira/browse/OPENZAP-220 seems to have similar
> symptoms, but manifests as a different error number. I upgraded Freeswitch
> last week (1.5.15b git 608d3e2 2015-01-22 09:09:59Z 64bit) to ensure that I
> had the patch referenced by the ticket. Is it possible that this could be a
> cabling issue? We're running Freeswitch on FreeBSD 10.0 amd64.
>
> I'm happy to provide any other information that would be useful. I'm
> [relatively] new to Freeswitch, so please be gentle ;-).
>
> Thank you,
> Tom
>
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:1451 -- Hangup ACK on
> channel 1:1
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:1460 [s1c1][1:1] Changed
> state from HANGUP to HANGUP_COMPLETE
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_state.c:541 [s1c1][1:1] Executing
> state processor for HANGUP_COMPLETE
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:942 -- 1:1 STATE
> [HANGUP_COMPLETE]
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:950 [s1c1][1:1] Completed
> state change from HANGUP to HANGUP_COMPLETE in 0 ms
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:1268 [s1c1][1:1] Changed
> state from HANGUP_COMPLETE to DOWN
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_state.c:541 [s1c1][1:1] Executing
> state processor for DOWN
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:942 -- 1:1 STATE [DOWN]
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:950 [s1c1][1:1] Completed
> state change from HANGUP_COMPLETE to DOWN in 0 ms
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_io.c:3194 [s1c1][1:1] DTMF debug is
> already disabled
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_io.c:3226 [s1c1][1:1] No need to
> disable input dump
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_io.c:3257 [s1c1][1:1] No need to
> disable output dump
> 2015-02-03 14:34:23.437947 [DEBUG] mod_freetdm.c:2707 got clear channel sig
> [RELEASED]
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_io.c:6873 Cleared call with id 37
> 2015-02-03 14:34:23.437947 [DEBUG] ftdm_io.c:2999 [s1c1][1:1] channel done
> 2015-02-03 14:34:23.437947 [DEBUG] ftmod_libpri.c:978 -- Closed channel 1:1
> 2015-02-03 14:34:23.679236 [DEBUG] switch_ivr_originate.c:2099 Parsing
> global variables
> 2015-02-03 14:34:23.679236 [DEBUG] switch_event.c:1688 Parsing variable
> [ignore_early_media]=[true]
> 2015-02-03 14:34:23.679236 [DEBUG] switch_event.c:1688 Parsing variable
> [file]=[46475.tif]
> 2015-02-03 14:34:23.679236 [DEBUG] switch_event.c:1688 Parsing variable
> [jobid]=[293102]
> 2015-02-03 14:34:23.679236 [INFO] ftmod_zt.c:671 Setting echo cancel to 64
> taps for 1:1
> 2015-02-03 14:34:23.679236 [DEBUG] mod_freetdm.c:403 Set codec PCMU 20ms
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.679236 [DEBUG]
> mod_freetdm.c:1251 Connect outbound channel FreeTDM/1:1/18019941076
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.679236 [NOTICE]
> switch_channel.c:1055 New Channel FreeTDM/1:1/18019941076
> [8d09030a-e4ab-e411-905b-0026b95c8602]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.679236 [DEBUG]
> mod_freetdm.c:1260 (FreeTDM/1:1/18019941076) State Change CS_NEW -> CS_INIT
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.679236 [DEBUG]
> switch_core_session.c:1388 Send signal FreeTDM/1:1/18019941076 [BREAK]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.679236 [DEBUG]
> mod_freetdm.c:1279 Attached session 8d09030a-e4ab-e411-905b-0026b95c8602 to
> channel 1:1
> 2015-02-03 14:34:23.679236 [DEBUG] mod_freetdm.c:1767 [s1c1][1:1] Changed
> state from DOWN to DIALING
> 2015-02-03 14:34:23.778359 [DEBUG] ftdm_state.c:541 [s1c1][1:1] Executing
> state processor for DIALING
> 2015-02-03 14:34:23.778359 [DEBUG] ftmod_libpri.c:942 -- 1:1 STATE [DIALING]
> 2015-02-03 14:34:23.778359 [DEBUG] mod_freetdm.c:2707 got clear channel sig
> [DIALING]
> 2015-02-03 14:34:23.778359 [DEBUG] ftmod_libpri.c:950 [s1c1][1:1] Completed
> state change from DOWN to DIALING in 95 ms
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:472 (FreeTDM/1:1/18019941076) Running State
> Change CS_INIT
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:512 (FreeTDM/1:1/18019941076) State INIT
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> mod_freetdm.c:430 (FreeTDM/1:1/18019941076) State Change CS_INIT ->
> CS_ROUTING
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_session.c:1388 Send signal FreeTDM/1:1/18019941076 [BREAK]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:512 (FreeTDM/1:1/18019941076) State INIT going
> to sleep
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:472 (FreeTDM/1:1/18019941076) Running State
> Change CS_ROUTING
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:528 (FreeTDM/1:1/18019941076) State ROUTING
> 2015-02-03 14:34:23.778359 [DEBUG] mod_freetdm.c:453 FreeTDM/1:1/18019941076
> CHANNEL ROUTING
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_ivr_originate.c:67 (FreeTDM/1:1/18019941076) State Change CS_ROUTING
> -> CS_CONSUME_MEDIA
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_session.c:1388 Send signal FreeTDM/1:1/18019941076 [BREAK]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:528 (FreeTDM/1:1/18019941076) State ROUTING
> going to sleep
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:472 (FreeTDM/1:1/18019941076) Running State
> Change CS_CONSUME_MEDIA
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:547 (FreeTDM/1:1/18019941076) State
> CONSUME_MEDIA
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.778359 [DEBUG]
> switch_core_state_machine.c:547 (FreeTDM/1:1/18019941076) State
> CONSUME_MEDIA going to sleep
> 2015-02-03 14:34:23.799281 [DEBUG] ftmod_libpri.c:1466 -- Hangup on channel
> 1:1
> 2015-02-03 14:34:23.799281 [DEBUG] ftmod_libpri.c:1479 [s1c1][1:1] Changed
> state from DIALING to TERMINATING
> 2015-02-03 14:34:23.799281 [DEBUG] ftdm_state.c:541 [s1c1][1:1] Executing
> state processor for TERMINATING
> 2015-02-03 14:34:23.799281 [DEBUG] ftmod_libpri.c:942 -- 1:1 STATE
> [TERMINATING]
> 2015-02-03 14:34:23.799281 [DEBUG] ftmod_libpri.c:950 [s1c1][1:1] Completed
> state change from DIALING to TERMINATING in 0 ms
> 2015-02-03 14:34:23.799281 [DEBUG] ftdm_io.c:6216 [s1c1][1:1] Scheduling
> safety hangup timer
> 2015-02-03 14:34:23.799281 [DEBUG] mod_freetdm.c:2707 got clear channel sig
> [STOP]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [NOTICE]
> mod_freetdm.c:2731 Hangup FreeTDM/1:1/18019941076 [CS_CONSUME_MEDIA]
> [REQUESTED_CHAN_UNAVAIL]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [DEBUG]
> switch_channel.c:3222 Send signal FreeTDM/1:1/18019941076 [KILL]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [DEBUG]
> switch_core_session.c:1388 Send signal FreeTDM/1:1/18019941076 [BREAK]
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [DEBUG]
> switch_core_state_machine.c:472 (FreeTDM/1:1/18019941076) Running State
> Change CS_HANGUP
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [DEBUG]
> switch_core_state_machine.c:735 (FreeTDM/1:1/18019941076) Callstate Change
> DOWN -> HANGUP
> 8d09030a-e4ab-e411-905b-0026b95c8602 2015-02-03 14:34:23.799281 [DEBUG]
> switch_core_state_machine.c:737 (FreeTDM/1:1/18019941076) State HANGUP
> 2015-02-03 14:34:23.799281 [DEBUG] mod_freetdm.c:544 [1:1]
> FreeTDM/1:1/18019941076 CHANNEL HANGUP ENTER
> 2015-02-03 14:34:23.799281 [DEBUG] mod_freetdm.c:623 [s1c1][1:1] Changed
> state from TERMINATING to HANGUP
> 2015-02-03 14:34:23.819045 [DEBUG] switch_ivr_originate.c:3719 Originate
> Resulted in Error Cause: 44 [REQUESTED_CHAN_UNAVAIL]
> 2015-02-03 14:34:23.918415 [DEBUG] ftdm_state.c:541 [s1c1][1:1] Executing
> state processor for HANGUP
> 2015-02-03 14:34:23.918415 [DEBUG] ftmod_libpri.c:942 -- 1:1 STATE [HANGUP]
> 2015-02-03 14:34:23.918415 [DEBUG] ftmod_libpri.c:950 [s1c1][1:1] Completed
> state change from TERMINATING to HANGUP in 109 ms
> 2015-02-03 14:34:23.918415 [DEBUG] mod_freetdm.c:643 [1:1]
> FreeTDM/1:1/18019941076 CHANNEL HANGUP EXIT
>
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