IV18623: MQ V7: USING MESSAGE SELECTOR "IS NULL" WORKS FOR "JMSTYPE" AND OTHER FIELDS, BUT DOES NOT WORK FOR JMSCORRELATIONID.

Fix Pack 7.1.0.2 for WebSphere MQ V7.1
WebSphere MQ V7.5 Fix Pack 7.5.0.1
WebSphere MQ V7.0 Fix Pack 7.0.1.10
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.10

APAR status

• Closed as program error.

Error description

• A WebSphere MQ V7 subscriber tried to select on a message using
  the selection string "JMSCorrelationID IS NULL". Messages were
  not being delivered to this subscriber, even though the
  MQMD.CorrelId was set to NULL.
  
  Similarly, the selection string "JMSCorrelationID IS NOT NULL"
  was allowing messages to be delivered when they should not have
  been.
  
  Other properties such as JMSType behaved as expected when using
  "IS NULL"
  

Local fix

• As a workaround, try using the selection string
  JMSCorrelationID =
  'ID:000000000000000000000000000000000000000000000000'
  which should return messages correctly.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who have subscriber applications that use the selection
  string "JMSCorrelationID IS NULL" or "JMSCorrelationID IS NO
  NULL" to select on Root.MQMD.CorrelId may receive messages in
  error or not receive messages that they should receive.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The problem was caused by the code incorrectly returning a
  string representation of the NULL MQMD.CorrelId rather than a
  byte representation. This caused the selector matching
  algorithms to make incorrect decisions regarding whether
  messages should be delivered to subscribers.
  

Problem conclusion

• The code was corrected so that if the MQMD.CorrelId is NULL the
  the value is returned to the selection engine as bytes rather
  than as a string.
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.10
  --------           --------------------
  Windows            7.0.1.10
  AIX                7.0.1.10
  HP-UX (PA-RISC)    7.0.1.10
  HP-UX (Itanium)    7.0.1.10
  Solaris (SPARC)    7.0.1.10
  Solaris (x86-64)   7.0.1.10
  iSeries            7.0.1.10
  Linux (x86)        7.0.1.10
  Linux (x86-64)     7.0.1.10
  Linux (zSeries)    7.0.1.10
  Linux (Power)      7.0.1.10
  
                     v7.1
  Platform           Fix Pack 7.1.0.2
  --------           --------------------
  Windows            7.1.0.2
  AIX                7.1.0.2
  HP-UX (Itanium)    7.1.0.2
  Solaris (SPARC)    7.1.0.2
  Solaris (x86-64)   7.1.0.2
  iSeries            7.1.0.2
  Linux (x86)        7.1.0.2
  Linux (x86-64)     7.1.0.2
  Linux (zSeries)    7.1.0.2
  Linux (Power)      7.1.0.2
  
  Platform           v7.5
  --------           --------------------
  Multiplatforms     7.5.0.1
  
  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:

  PM67917

Fix information

• Fixed component name

  WMQ AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R701 PSY

     UP