IT15004: FDC with probe ID HL086204 generated in mqlReclaimExtents but the queue manager does not stop as expected

APAR status

• Closed as program error.

Error description

• A Failure Data Capture (FDC) file with Probe Id HL086204 is
  generated:
  .
    Probe Id          :- HL086204
    Component         :- mqlReclaimExtents
    Process Name      :- D:\MQSeries\bin\amqzmuc0.exe
    Major Errorcode   :- xecF_E_UNEXPECTED_RC
    Minor Errorcode   :- STOP_ALL
    Probe Type        :- MSGAMQ6118
    Probe Description :- AMQ6118: An internal WebSphere MQ
                         error has occurred  (40406110)
    Arith1            :- 1077960976 40406110
    ------------------------------------------------------
    MQM Function Stack
    zmuThreadMain
    zmuLogIOTask
    mqlpgasn
    mqlReclaimExtents
    xcsFFST
  .
  The expectation is that the queue manager would stop when
  this is generated but it does not.
  

Local fix

• Manually restart the queue manager using a graceful shutdown if
  an FDC with probe ID HL086204 is observed and the queue manager
  continues to run after the FDC is generated.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  IBM MQ Server applications
  
  
  Platforms affected:
  Linux on x86-64, Linux on x86, Solaris x86-64, Solaris SPARC,
  AIX, HP-UX Itanium, HP-UX PA-RISC, HP-UX OpenVMS, IBM iSeries,
  Linux on Power, Linux on S390, Linux on zSeries, Windows,
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  The FDC indicates IBM MQ encountered an unexpected state when
  working with the Transaction Logs whilst reclaiming log extents.
   In this state the internal counters are not correctly aligned
  to the current state of logger extents so further undefined
  problems may occur, and so the queue manager should have stopped
  such that the counters could be re-aligned to their correct
  values on restart.
  
  Even though the FDC indicated a STOP condition, the queue
  manager incorrectly continued to run.
  

Problem conclusion

• In addition to ensuring the queue manager stops as intended in
  this scenario, IBM MQ has been updated with additional
  diagnostic capability that improves the detection of the
  discrepancies that lead up to the FDC.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.1       7.1.0.9
  v7.5       7.5.0.8
  v8.0       8.0.0.7
  
  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

• R710 PSY

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