IZ52214: QUEUE MANAGER PROCESSES THAT ACCESS CHANNEL STATUS TABLE FAIL WHEN MaxChannels VALUE IS VERY HIGH

WebSphere MQ V7.0 Fix Pack 7.0.1.1
WebSphere MQ V7.0 Fix Pack 7.0.1.2
WebSphere MQ 6.0 for HP OpenVMS Alpha and Itanium - Fix Pack 6.0.2.10 (FP03)
WebSphere MQ V6.0 Fix Pack 6.0.2.8
WebSphere MQ V6.0 for iSeries Fix Pack 6.0.2.8

APAR status

• Closed as program error.

Error description

• Typically error AMQ9522 with error code 545284153(0x20806039 -
  xecS_E_TOO_BIG) will be logged in the error log and in some
  cases accompanied by FDC with probe RM241000 and error
  rrcE_STATUS_TABLE_ERROR.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users setting very high value for MaxChannels in V6 and V7.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The queue manager calculates the Status table size based on the
  value set for the MaxChannels. When this value was very large,
  the queue manager tried to allocate large amount of memory
  for the channel status table. The attempt to allocate memory
  for a large channel status table failed, resulting in the
  AMQ9522 error.
  

Problem conclusion

• Appropriate code changes have been made to restrict the
  MaxChannels to 65535 which is the maximum as per design.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v6.0
  Platform           Fix Pack 6.0.2.8
  --------           --------------------
  Windows            U200309
  AIX                U825517
  HP-UX (PA-RISC)    U824678
  HP-UX (Itanium)    U825875
  Solaris (SPARC)    U825511
  Solaris (x86-64)   U825872
  iSeries            tbc_p600_0_2_8
  Linux (x86)        U825181
  Linux (x86-64)     U825874
  Linux (zSeries)    U825516
  Linux (Power)      U825182
  Linux (s390x)      U825873
  
                     v7.0
  Platform           Fix Pack 7.0.1.0
  --------           --------------------
  Windows            U200306
  AIX                U823774
  HP-UX (PA-RISC)    U823665
  HP-UX (Itanium)    U823667
  Solaris (SPARC)    U823772
  Solaris (x86-64)   U824344
  iSeries            tbc_p700_0_1_0
  Linux (x86)        U823664
  Linux (x86-64)     U823773
  Linux (zSeries)    U823668
  Linux (Power)      U823666
  
  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 V6

• Fixed component ID

  5724H7204

Applicable component levels

• R601 PSY

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