IV39740: MQ PRODUCES AN "OK" EVENT MESSAGE WHEN THE INTERNAL SERVICE TIMER IS NOT STARTED

WebSphere MQ V7.0 Fix Pack 7.0.1.11
Fix Pack 7.1.0.4 for WebSphere MQ V7.1
WebSphere MQ V7.5 Fix Pack 7.5.0.3

APAR status

• Closed as program error.

Error description

• When using performance events with MQBACK in WebSphere MQ, the
  internal service timer is not started and the time taken is 0.
  
  However, WebSphere MQ thinks it is shorter than the service
  interval setting, then producing the "OK" event message.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of WebSphere MQ that are using the Queue Service interval
  events of the Performance Event function.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The Queue Service Interval Events are generated when the time
  taken between an MQPUT and 'get' operation is greater or less
  than the service time interval, dependent on the Queue Service
  Interval (OK or HIGH) on the Queue at that time.
  
  When a message was put on the Queue via the MQBACK call rather
  than a MQPUT then the internal timer used to determine service
  interval was not started. This is correct as it is only an
  MQPUT that defines when the service interval timer starts.
  However, when the Queue Service Interval was set to OK on the
  Queue a OK event message was generated on the following MQGET
  after theMQBACK call regardless as to what time the MQGET call
  was made.
  

Problem conclusion

• This APAR solves the problem by not generating the OK event
  message when a message was retrieved via an 'get' operation when
  that message was not placed on the queue via an MQPUT call.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.11
  --------           --------------------
  Windows            7.0.1.11
  AIX                7.0.1.11
  HP-UX (PA-RISC)    7.0.1.11
  HP-UX (Itanium)    7.0.1.11
  Solaris (SPARC)    7.0.1.11
  Solaris (x86-64)   7.0.1.11
  iSeries            7.0.1.11
  Linux (x86)        7.0.1.11
  Linux (x86-64)     7.0.1.11
  Linux (zSeries)    7.0.1.11
  Linux (Power)      7.0.1.11
  
                     v7.1
  Platform           Fix Pack 7.1.0.4
  --------           --------------------
  Windows            7.1.0.4
  AIX                7.1.0.4
  HP-UX (Itanium)    7.1.0.4
  Solaris (SPARC)    7.1.0.4
  Solaris (x86-64)   7.1.0.4
  iSeries            7.1.0.4
  Linux (x86)        7.1.0.4
  Linux (x86-64)     7.1.0.4
  Linux (zSeries)    7.1.0.4
  Linux (Power)      7.1.0.4
  
  Platform           v7.5
  --------           --------------------
  Multiplatforms     7.5.0.3
  
  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 LIN X86 V7

• Fixed component ID

  5724H7224

Applicable component levels

• R701 PSY

     UP