PM52505: 200 OK RESPONSE RETRANSMISSIONS FOR A RE-INVITE ARE DROPPED BY THE SIP CONTAINER

8.0.0.3: WebSphere Application Server V8.0 Fix Pack 3
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• The 200 OK response retransmissions for a RE_INVITE (in-dialog
  INVITE scenario) are dropped by the Session Initiation
  Protocol (SIP) container.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server V8.0       *
  *                  Developers using the Session Initiation     *
  *                  Protocol (SIP) container.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: In Proxy mode the SIP container drops   *
  *                      "200 OK" messages to an in-dialog       *
  *                      INVITE request.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  There was no code path for dealing with a scenario where the
  SIP container in Proxy mode receives "2xx" response
  retransmissions to an in-dialog INVITE request. The program
  ran the code for retransmissions of a "2xx "response to an
  initial INVITE. However, obviously no branch could be found
  for the transaction because it was a case of an in-dialog
  INVITE (and not an initial one) thus an error message
  was printed to the traces: "Error, Failed to find a matching
  branch".
  

Problem conclusion

• In Proxy mode when receiving a "2xx" response to an in-dialog
  INVITE the response is saved on a "TransactionUserImpl" object
  after it comes back from the application level. In case a
  retransmission is recieved we send the saved response directly
  to transport.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.0.0.2. 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 is sysrouted FROM one or more of the following:

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

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R800 PSY

     UP