[asterisk-bugs] [JIRA] (ASTERISK-28922) Attended transfer not swapping channel

Fri May 29 01:01:25 CDT 2020

Robert Sutton created ASTERISK-28922:
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             Summary: Attended transfer not swapping channel
                 Key: ASTERISK-28922
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28922
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Bridges/bridge_simple
    Affects Versions: 16.10.0
         Environment: ubunutu 18.04, docker, asterisk 16.10, pjsip
            Reporter: Robert Sutton

occasionally an attended transfer results in the agents channel name appearing in the bridge instead of the callers.

It appears that asterisk fails to swap the channel names.

The connected parties are as expected but the channel names are wrong which is causing problems for reporting and some of our other external systems.

I can't recreate this on demand, I would estimate the frequency at about 1 in 500 attended transfers.

There are 4 channels in volved
a (000005c6) caller
b (000005d1) agent -> a
c (000005cb) agent -> d
d (000005d2) other

The call flow is:
1 incoming call (a) answered by agent (b).
2 AMI originate a second call (c) to the agent.
3 agent answers second call (c) (the far end (d) is making progress, but not yet answered).
4 agent uses "swap" button on phone to talk to original caller (b).
5 agent transfers the caller to the other call (b,c) , simultaneously the other call (d) answers.
6 the bridge shows channels (d) and (b) in the bridge instead of (a) and (d)
7 the expected parties are bridged and call completes normally

{noformat}

2020-05-28T22:44:49.125240532Z     -- Called 147
2020-05-28T22:44:49.470682765Z     -- PJSIP/147-000005d1 is ringing
2020-05-28T22:44:49.470716891Z     -- PJSIP/147-000005d1 is ringing
2020-05-28T22:44:50.344321032Z     -- PJSIP/147-000005d1 answered
2020-05-28T22:44:50.344493873Z     -- Executing [55512341234 at routesv2-handset:1] Set("PJSIP/147-000005d1", "AGIEXITONHANGUP=yes") in new stack
2020-05-28T22:44:50.344574542Z     -- Executing [55512341234 at routesv2-handset:2] AGI("PJSIP/147-000005d1", "agi://127.0.0.1/route?targ=55512341234&ctx=Pre-Handset") in new stack
2020-05-28T22:44:50.348169514Z     -- AGI Script Executing Application: (Progress) Options: ()
2020-05-28T22:44:50.348553523Z     -- AGI Script Executing Application: (Playtones) Options: (ring)
2020-05-28T22:44:50.353520608Z     -- AGI Script Executing Application: (StopPlayTones) Options: ()

2020-05-28T22:44:50.478424444Z   == Begin MixMonitor Recording PJSIP/147-000005d1

2020-05-28T22:44:50.496147459Z     -- AGI Script Executing Application: (dial) Options: (PJSIP/55512341234 at trunk,30,rb(set-header^1^1)B(set-clid^1^1(55533332222,)))
2020-05-28T22:44:50.496431063Z     -- PJSIP/147-000005d1 Internal Gosub(set-clid,1,1(55533332222,)) start
2020-05-28T22:44:50.496449977Z     -- Executing [1 at set-clid:1] Verbose("PJSIP/147-000005d1", "1,preparing to set clid") in new stack
2020-05-28T22:44:50.496458410Z  preparing to set clid
2020-05-28T22:44:50.496536886Z     -- Executing [1 at set-clid:2] Set("PJSIP/147-000005d1", "CALLERID(num)=55533332222") in new stack
2020-05-28T22:44:50.496557244Z     -- Executing [1 at set-clid:3] Set("PJSIP/147-000005d1", "CALLERID(name)=") in new stack
2020-05-28T22:44:50.496646457Z     -- Executing [1 at set-clid:4] Return("PJSIP/147-000005d1", "") in new stack
2020-05-28T22:44:50.496658470Z   == Spawn extension (routesv2-handset, 55512341234, 2) exited non-zero on 'PJSIP/147-000005d1'
2020-05-28T22:44:50.496664422Z     -- PJSIP/147-000005d1 Internal Gosub(set-clid,1,1(55533332222,)) complete GOSUB_RETVAL=
2020-05-28T22:44:50.502254652Z     -- PJSIP/trunk-000005d2 Internal Gosub(set-header,1,1) start
2020-05-28T22:44:50.502276235Z     -- Executing [1 at set-header:1] Verbose("PJSIP/trunk-000005d2", "1,preparing to set headers") in new stack
2020-05-28T22:44:50.502324362Z  preparing to set headers
2020-05-28T22:44:50.502533577Z     -- Executing [1 at set-header:2] Set("PJSIP/trunk-000005d2", "AGIEXITONHANGUP=yes") in new stack
2020-05-28T22:44:50.502548007Z     -- Executing [1 at set-header:3] Set("PJSIP/trunk-000005d2", "PJSIP_HEADER(add,Call-Info)=") in new stack
2020-05-28T22:44:50.503072316Z     -- Executing [1 at set-header:4] ExecIf("PJSIP/trunk-000005d2", "1?return()") in new stack
2020-05-28T22:44:50.503272445Z   == Spawn extension (routesv2-inbound, 55512341234, 1) exited non-zero on 'PJSIP/trunk-000005d2'
2020-05-28T22:44:50.503314327Z     -- PJSIP/trunk-000005d2 Internal Gosub(set-header,1,1) complete GOSUB_RETVAL=
2020-05-28T22:44:50.503323399Z     -- Called PJSIP/55512341234 at trunk

2020-05-28T22:44:50.579111153Z   == Begin MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:50.679223223Z   == Begin MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:51.063049680Z OK  == End MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:51.124326992Z OK  == End MixMonitor Recording PJSIP/147-000005d1

2020-05-28T22:44:51.789749843Z     -- Call on PJSIP/trunk-000005d2 placed on hold
2020-05-28T22:44:51.792444137Z     -- Started music on hold, class 'default2', on channel 'PJSIP/trunk-000005d2'
2020-05-28T22:44:51.911628373Z     -- Stopped music on hold on PJSIP/trunk-000005c6
2020-05-28T22:44:52.632191581Z     -- Channel PJSIP/147-000005cb left 'simple_bridge' basic-bridge <44009243-408d-4889-8839-bc60e4ad46db>
2020-05-28T22:44:52.632661038Z     -- Channel PJSIP/trunk-000005c6 left 'simple_bridge' basic-bridge <44009243-408d-4889-8839-bc60e4ad46db>
2020-05-28T22:44:52.632735669Z   == Spawn extension (company-activity, activity-agi, 2) exited non-zero on 'PJSIP/147-000005cb'

2020-05-28T22:44:56.511197717Z     -- PJSIP/trunk-000005d2 is making progress passing it to PJSIP/147-000005d1
2020-05-28T22:44:56.511370052Z     -- PJSIP/trunk-000005d2 is making progress passing it to PJSIP/147-000005d1
2020-05-28T22:44:59.166297182Z     -- PJSIP/trunk-000005d2 answered PJSIP/147-000005d1
2020-05-28T22:44:59.167460733Z     -- Channel PJSIP/trunk-000005d2 joined 'simple_bridge' basic-bridge <d8d44dd2-9386-40ed-9782-b1c9f71d225a>
2020-05-28T22:44:59.167681295Z     -- Channel PJSIP/147-000005d1 joined 'simple_bridge' basic-bridge <d8d44dd2-9386-40ed-9782-b1c9f71d225a>

2020-05-28T22:44:59.200426835Z   == Begin MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:59.285524521Z   == Begin MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:59.306030575Z   == Begin MixMonitor Recording PJSIP/trunk-000005d2
2020-05-28T22:44:59.723198569Z OK  == End MixMonitor Recording PJSIP/147-000005d1
2020-05-28T22:44:59.756330292Z OK  == End MixMonitor Recording PJSIP/147-000005d1

{noformat}

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