IT15599: MQ channel stuck in initializing state and FDC produced from amqrmppa process with probeid XC130003

APAR status

• Closed as program error.

Error description

• An MQ channel will not connect and DISPLAY CHS shows the channel
  in
  STATUS(INITIALIZING).
  
  The amqrmppa process issues initial failure data capture (FDC)
  file with a Probeid XC130003.
  Subsequent FDC files are issued with the following pattern:
  
  amqrmppa  42240  33 XC130003 xehExceptionHandler STOP
  amqrmppa  42240  33 RM042101 rrxReportError      STOP
  amqzxma0  80262   1 ZX005022 zxcProcessChildren
  lrcW_S_FAST_PATH_APP_DEAD
  
  This FDC pattern repeats as channel attempts to start.
  
  These external symptoms are same as APAR IT12477 but the
  underlying root cause is different to that APAR.
  

Local fix

• Disable the message suppression function to prevent this
  scenario.
  
  Unset the following environment variables to disable the message
  suppression function:
  
  MQ_CHANNEL_SUPPRESS_MSGS
  MQ_CHANNEL_SUPPRESS_INTERVAL
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using channels and queue managers configured to suppress
  error messages.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A coding error meant that it was possible for the channel
  process to access an uninitialized internal channel attribute
  used when suppressing messages. This in turn caused a memory
  exception when attempting to suppress error messages.
  

Problem conclusion

• The MQ queue manager channel code has been updated to add a new
  check to prevent the memory exception.
  Another APAR fixed in this area was IT12477 and it is
  recommended to apply the fix for both IT15599 and IT12477 if
  these symptoms are observed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.6
  v9.0 CD    9.0.2
  v9.0 LTS   9.0.0.1
  
  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:

Fix information

• Fixed component name

  WMQ BASE MULTIP

• Fixed component ID

  5724H7251

Applicable component levels

• R800 PSY

     UP