IBM Support

PM21994: WHEN SERVICE INTEGRATION BUS CONNECTS TO MQ, ERROR 2025 (MQRC_MA X_CONNS_LIMIT_REACHED) OCCURS UPON RESTARTING CHANNEL INITIATOR.

Fixes are available

7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for AIX
7.0.0.15: Java SDK 1.6 SR9 Cumulative Fix for WebSphere Application Server
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for HP-UX
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for IBM i
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Linux
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Solaris
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Windows
7.0.0.17: WebSphere Application Server V7.0 Fix Pack 17
7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When WebSphere Application Server default Messaging Provider,
    implemented by the Service Integration Bus (SIB), connects to a
    WebSphere MQ, the error 2025 (MQRC_MAX_CONNS_LIMIT_REACHED) is
    seen on the MQ side when the channel initiator is restarted.
    On the SIB side, the following are written to an FFDC file:
    at com.ibm.mq.MQQueueManagerFactory.processException(MQQueueMana
    gerFactory.java:959)
    at com.ibm.mq.MQQueueManagerFactory.obtainBaseMQQueueManager(MQQ
    ueueManagerFactory.java:880)
    at com.ibm.mq.MQQueueManagerFactory.createQueueManager(MQQueueMa
    nagerFactory.java:171)
    at com.ibm.mq.MQQueueManager.<init>(MQQueueManager.java:684)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of the default messaging provider for *
    *                  IBM WebSphere Application Server            *
    *                  Version 7.0, with WebSphere MQ Server bus   *
    *                  members                                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: CWSIP0002 error with WebSphere MQ       *
    *                      reason code 2025                        *
    *                      (MQRC_MAX_CONNS_LIMIT_REACHED)          *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The service integration bus messaging engine incorrectly sets
    a limit on the number of internally created connections to the
    WebSphere MQ Server bus member queue manager. Under normal
    operation, this might cause MQRC_MAX_CONNS_LIMIT_REACHED
    exceptions, which are treated as severe exceptions by the
    messaging engine and cause MDB applications to be disconnected
    and need to reconnect to the bus.
    
    In addition, the incorrect specification of a limit by the
    messaging engine combines with WebSphere MQ APAR IZ83390,
    causing MQRC_MAX_CONNS_LIMIT_REACHED errors to be reported
    even when the limit has not been reached, especially after
    losing connectivity to a queue manager.
    

Problem conclusion

  • The fix for this APAR removes the incorrectly specified
    internal limit on the number of connections a messaging engine
    could make to a queue manager. This removes the possibility of
    encountering WebSphere MQ APAR IZ83390, and prevents the
    arbitrary limit from causing CWSIP0002 errors during normal
    operation.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 7.0.0.15.  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

    PM21994

  • Reported component name

    PLAT MSG COM

  • Reported component ID

    620800101

  • Reported release

    300

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-09-06

  • Closed date

    2010-10-29

  • Last modified date

    2010-10-29

  • 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

    PLAT MSG COM

  • Fixed component ID

    620800101

Applicable component levels

  • R300 PSY

       UP



Document information

More support for: WebSphere Application Server
Service Integration Technology

Software version: 7.0

Reference #: PM21994

Modified date: 29 October 2010