IC70664: WMQ V7 SUBSCRIBER FAILS WITH JMSWMQ0026 WHEN UNSUBSCRIBING AND RE-SUBSCRIBING USING EMPTY SELECTOR STRING ("")

WebSphere MQ V7.0 Fix Pack 7.0.1.4
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.4

APAR status

• Closed as program error.

Error description

• A WebSphere MQ (WMQ) V7 JMS application using an asynchronous
  session which subscribes to a durable topic receives a
  few messages, then closes using the JMS message consumer
  consumer.close().
  
  The application then subscribes again using
  empty selector string (""). This fails with error:
  
  error: com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ0026:
  Failed to subscribe to topic 'A_TOPIC' using MQSUB.
  Error message JMSWMQ0025 Failed to unsubscribe from topic
  'A_TOPIC' using MQCLOSE
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of the WebSphere MQ v7 classes for Java
  Message Service (JMS) that use durable subscribers with message
  selectors.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows) +Java
  ****************************************************************
  PROBLEM SUMMARY:
  The problem occurred while using the empty string as the message
  selector. The MQ JMS Client did not treat an empty string as
  equivalent to null in the case of a durable subscription.
  

Problem conclusion

• The fix ensures that the empty string and "null" are treated
  equivalent in case of durable subscriptions.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.4
  --------           --------------------
  Windows            U200323
  AIX                U835793
  HP-UX (PA-RISC)    U836458
  HP-UX (Itanium)    U836463
  Solaris (SPARC)    U836459
  Solaris (x86-64)   U836465
  iSeries            tbc_p700_0_1_4
  Linux (x86)        U836460
  Linux (x86-64)     U836464
  Linux (zSeries)    U836461
  Linux (Power)      U836462
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available, information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R700 PSY

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