PM52359: SIP CONTAINER DISCARDS THE CANCEL IN RACE CONDITION

Fixes are available

APAR status

Closed as program error.

Error description

We have a race condition, which occurs when we sent a reliable
interim response (i.e. a response expecting a PRACK) on our
incoming leg just as the incoming leg is sending a CANCEL.  The
behavior we see is that Websphere discards the CANCEL in this
case   not passing it to the application code.  No PRACK is ever
sent from the incoming leg, since the other side of the dialog
thinks that dialog is terminated, having sent a CANCEL.

Local fix

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N/A
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Problem summary

****************************************************************
* USERS AFFECTED:  All Session Initiation Protocol (SIP)       *
*                  container users of IBM WebSphere            *
*                  Application Server v7.0 and V8.0            *
****************************************************************
* PROBLEM DESCRIPTION: SIP Cancel request is not sent to the   *
*                      application                             *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When 200 OK response for Cancel is received after reliable
response it is discarded by the SIP container.

Problem conclusion

SIP container is no longer discarding 200 OK responses on
Cancel after reliable responses

The fix for this APAR is currently targeted for inclusion in
fix packs 7.0.0.21 and 8.0.0.3.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PM52359
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-11-16
Closed date
2011-12-26
Last modified date
2012-04-20

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

PM52728

Fix information

Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R700 PSY
UP
R800 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 October 2021

Tips

PM52359: SIP CONTAINER DISCARDS THE CANCEL IN RACE CONDITION

Fixes are available

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APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY

R800 PSY

Document Information

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