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PM16928: CONTAINER IS NOT ACKING RESPONSE RETRANSMISSIONS THAT ARRIVE AFTER SENDING A RE-INVITE.

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APAR status

  • Closed as program error.

Error description

  • Container is not ACKing response retransmissions that arrive
    after sending a re-INVITE.
    
    WebSphere Application Server V6.0.
    Distributed Operating Systems.
    

Local fix

  • NA
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Session Initiation Protocol (SIP) users     *
    *                  of IBM Websphere Application Server         *
    *                  Feature Pack for Communications Enabled     *
    *                  Applications (CEA)                          *
    ****************************************************************
    * PROBLEM DESCRIPTION: The container fails to re-send an ACK   *
    *                      for response retransmissions.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem occurs when the application sends an INVITE
    request, followed by another INVITE on the same SIP dialog.
    
    For example:
    
    1. Send INVITE
    2. Receive 200 response to (1)
    3. Send ACK
    4. Send re-INVITE
    5. Receive 200 response to (1)
    
    Note the remote element transmits the same 200 (OK) response
    twice, for the same INVITE request. The re-transmission
    arrives after having sent the re-INVITE. In this case, the
    container fails to re-send the ACK.
    

Problem conclusion

  • The problem is fixed in the SIP container. With this fix, the
    container re-sends the ACK when it receives a response
    retransmission, even if there is a re-INVITE in between.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 1.0.0.7 for the Feature Pack for Communications
    Enabled Applications. Please refer to the Recommended Updates
    page for delivery information:
    http://www-01.ibm.com/support/docview.wss?rs=180&uid=swg27017328
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM16928

  • Reported component name

    CEA FEATUREPACK

  • Reported component ID

    5724J0855

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-06-22

  • Closed date

    2010-07-01

  • Last modified date

    2010-07-01

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

    PM13903

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

Fix information

  • Fixed component name

    CEA FEATUREPACK

  • Fixed component ID

    5724J0855

Applicable component levels

  • R700 PSY

       UP



Document information

More support for: WebSphere Application Server V7 Feature Pack for Communications Enabled Applications
General

Software version: 700

Reference #: PM16928

Modified date: 01 July 2010