PJSIP endpoint stays/hangs "in use"

Asterisk Asterisk SIP
#1

Hello everyone,
I’m using Asterisk 16.16.1 with PJSIP.
Problem is that after one or two days, the PJSIP endpoint to the ISP stays/hangs “in use”. This endpoint is monitored on BLF, so it seems that the line to the ISP is always busy.
But there are no active channels, nor any other active endpoints.
New incoming or outgoing calls work fine, but don’t clear “in use”.
Just reloading PJSIP, (sometimes restart asterisk) clears the state to “idle”.
I observe this behavior since two years now, it started in Asterisk 13.
Unfortunately I have no idea how to debug this or what might be the cause.
In the dialplan every extension is ending in Hangup(); Return() to terminate the channels correctly.
Any help or hints are really appreciated.

Marco

#2

Are you using realtime? What does “core show hints” show? If you enable “debug” to go to the full log in logger.conf and do “core set debug 5” does it show any information around when it occurs?

#3

Thanks a lot for your quick reply.
No, I’m not using realtime.
I can enable the logger, but I can’t monitor the PXB personally, so I can’t tell when the state hang exactly occurs. This is part of the problem.

> core show hints
 :
1080@ext-hints      : PJSIP/telekom_endpoi  State:InUse           Presence:not_set         Watchers  5
 :

All other endpoints are Idle.
What is technically needed to bring an endpoint from InUse back to Idle state?

#4

How did you establish there were no active channels? You would need to use the pjsip command, not the core one, to determine whether it had a user.

#5

From a device perspective this[1] is the logic for calculating device state for PJSIP. From a device perspective I’d expect this to only occur if it believes there are channels still associated with the endpoint. If you confirmed that it is the device state that is incorrect, then it would be something relating to that. If the device state is correct but the hint is wrong, then it would be in the hints code.

You can’t reset the state of a device from the CLI or elsewhere.

[1] asterisk/chan_pjsip.c at master · asterisk/asterisk · GitHub

#6

How did you establish there were no active channels?

DE-H-IPFIRE*CLI> pjsip show channels
No objects found.

while the endpoint is “InUse”.

#7

It’s definitely not the hint, it’s the endpoint itself:

DE-H-IPFIRE*CLI> pjsip show endpoint telekom_endpoint

 Endpoint:  <Endpoint/CID.....................................>  <State.....>  <Channels.>
    I/OAuth:  <AuthId/UserName...........................................................>
        Aor:  <Aor............................................>  <MaxContact>
      Contact:  <Aor/ContactUri..........................> <Hash....> <Status> <RTT(ms)..>
  Transport:  <TransportId........>  <Type>  <cos>  <tos>  <BindAddress..................>
   Identify:  <Identify/Endpoint.........................................................>
        Match:  <criteria.........................>
    Channel:  <ChannelId......................................>  <State.....>  <Time.....>
        Exten: <DialedExten...........>  CLCID: <ConnectedLineCID.......>
==========================================================================================

 Endpoint:  telekom_endpoint                                     In use        0 of inf
    OutAuth:  telekom_auth/05115555555
        Aor:  telekom_aor                                        0
      Contact:  telekom_aor/sip:tel.t-online.de            79e95ae29c NonQual         nan
  Transport:  transport-udp             udp      0      0  0.0.0.0:5060
   Identify:  telekom_ident/telekom_endpoint
        Match: 217.0.0.0/13


 ParameterName                      : ParameterValue
 ===================================================================
 100rel                             : yes
 accept_multiple_sdp_answers        : false
 accountcode                        :
 acl                                :
 aggregate_mwi                      : true
 allow                              : (g722|alaw|g729|g726|gsm|ulaw)
 allow_overlap                      : true
 allow_subscribe                    : true
 allow_transfer                     : true
 aors                               : telekom_aor
 asymmetric_rtp_codec               : false
 auth                               :
 bind_rtp_to_media_address          : false
 bundle                             : false
 call_group                         :
 callerid                           : <unknown>
 callerid_privacy                   : allowed_not_screened
 callerid_tag                       :
 connected_line_method              : invite
 contact_acl                        :
 context                            : from-trunk-telekom
 cos_audio                          : 0
 cos_video                          : 0
 device_state_busy_at               : 0
 direct_media                       : false
 direct_media_glare_mitigation      : none
 direct_media_method                : invite
 disable_direct_media_on_nat        : false
 dtls_auto_generate_cert            : No
 dtls_ca_file                       :
 dtls_ca_path                       :
 dtls_cert_file                     :
 dtls_cipher                        :
 dtls_fingerprint                   : SHA-256
 dtls_private_key                   :
 dtls_rekey                         : 0
 dtls_setup                         : active
 dtls_verify                        : No
 dtmf_mode                          : rfc4733
 fax_detect                         : false
 fax_detect_timeout                 : 0
 follow_early_media_fork            : true
 force_avp                          : false
 force_rport                        : true
 from_domain                        : tel.t-online.de
 from_user                          :
 g726_non_standard                  : false
 ice_support                        : false
 identify_by                        : username,ip
 ignore_183_without_sdp             : false
 inband_progress                    : false
 incoming_mwi_mailbox               :
 language                           :
 mailboxes                          :
 max_audio_streams                  : 1
 max_video_streams                  : 1
 media_address                      :
 media_encryption                   : no
 media_encryption_optimistic        : false
 media_use_received_transport       : false
 message_context                    :
 moh_passthrough                    : false
 moh_suggest                        : default
 mwi_from_user                      :
 mwi_subscribe_replaces_unsolicited : no
 named_call_group                   :
 named_pickup_group                 :
 notify_early_inuse_ringing         : false
 one_touch_recording                : false
 outbound_auth                      : telekom_auth
 outbound_proxy                     : sip:tel.t-online.de;lr
 pickup_group                       :
 preferred_codec_only               : false
 record_off_feature                 : automixmon
 record_on_feature                  : automixmon
 refer_blind_progress               : true
 rewrite_contact                    : true
 rpid_immediate                     : false
 rtcp_mux                           : false
 rtp_engine                         : asterisk
 rtp_ipv6                           : false
 rtp_keepalive                      : 0
 rtp_symmetric                      : true
 rtp_timeout                        : 0
 rtp_timeout_hold                   : 0
 sdp_owner                          : -
 sdp_session                        : Asterisk
 send_connected_line                : yes
 send_diversion                     : true
 send_history_info                  : false
 send_pai                           : false
 send_rpid                          : false
 set_var                            :
 srtp_tag_32                        : false
 stir_shaken                        : false
 sub_min_expiry                     : 0
 subscribe_context                  :
 suppress_q850_reason_headers       : false
 t38_udptl                          : false
 t38_udptl_ec                       : none
 t38_udptl_ipv6                     : false
 t38_udptl_maxdatagram              : 0
 t38_udptl_nat                      : false
 timers                             : yes
 timers_min_se                      : 90
 timers_sess_expires                : 1800
 tone_zone                          :
 tos_audio                          : 0
 tos_video                          : 0
 transport                          : transport-udp
 trust_connected_line               : yes
 trust_id_inbound                   : false
 trust_id_outbound                  : false
 use_avpf                           : false
 use_ptime                          : false
 user_eq_phone                      : false
 voicemail_extension                :
 webrtc                             : no
#8

Then it likely believes it still has a channel for some reason, why that is I do not know.

#9

Right.
Is it possible to get the endpoints (still) assigned channel by CLI?
That would narrow down the debug.

#10

I can’t think of a CLI command to do so. The ARI interface for endpoints should give a list, though, of the channels which are on the endpoint.

The “pjsip show endpoint” CLI command doesn’t do that, it looks at the complete list of channels on the system instead which is separate.

#12

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