IBM Support

PM34087: NULLPOINTEREXCEPTION IN FREEPOOL.CREATEORWAITFORCONNECTION. THIS HAPPENS ONLY WHEN J2C TRACE ENABLED.

Fixes are available

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

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • NullPointerException in FreePool.createOrWaitForConnection.
    This happens only when j2c trace is enabled. The following
    stack trace occurs:
    
    Caused by:
    java.lang.NullPointerException
    at com.ibm.ejs.j2c.FreePool.createOrWaitForConnection
    (FreePool.java:1167)
    at com.ibm.ejs.j2c.PoolManager.reserve
    (PoolManager.java:2471)
    

Local fix

  • disable j2c trace
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V7.0                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: NullPointerException when the trace     *
    *                      is enabled, the connection is claimed   *
    *                      as victim and we are trying to Dump     *
    *                      Trace Data.                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When the connection victim is  getting claimed we check if
    the connection request information is mismatched and when
    the trace is enabled you might get the following
    NullPointerException in traces:
    
    java.lang.NullPointerException
      at
    com.ibm.ejs.j2c.FreePool.createOrWaitForConnection(FreePool.java
    :1167)  at
    com.ibm.ejs.j2c.PoolManager.reserve(PoolManager.java:2471)
     at
    com.ibm.ejs.j2c.ConnectionManager.allocateMCWrapper(ConnectionMa
    nager.java:1059)
     at
    com.ibm.ejs.j2c.ConnectionManager.allocateConnection(ConnectionM
    anager.java:696)  at
    com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource.getConnection(WSJdbcD
    ataSource.java:668)
    atcom.ibm.ws.rsadapter.jdbc.WSJdbcDataSource.getConnection(WSJdb
    cDataSour ce.java:635)
    

Problem conclusion

  • Made code changes to check for NULL object and also use the
    temp mcWrapper object instead of NULL McWrapper object.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 7.0.0.19  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

    PM34087

  • 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

    2011-03-03

  • Closed date

    2011-05-20

  • Last modified date

    2011-06-18

  • 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

  • R700 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:
27 October 2021