IT33903: WEBSPHERE MQ: ABNORMALLY HIGH CPU USAGE IN AMQRMPPA PROCESS.

APAR status

• Closed as program error.

Error description

• The CPU usage of amqrmppa process increases suddenly while mq
  activities have not changed.
  
  The MQ trace file shows these lines repeated
  indefinitely.
  
  
   ----{  lpiSPICloseScratchPad
    Hobj(4)
   -----{  zstGetPCD
   ------{  zstVerifyPCD
   ------}  zstVerifyPCD rc=OK
   -----}  zstGetPCD rc=OK
   -----{  ziiBreakConnection
   -----}  ziiBreakConnection rc=OK
   ----}! lpiSPICloseScratchPad rc=MQRC_CONNECTION_BROKEN
   ----{  rrxError
    RetCode = 20009590, rc1 = 2009, rc2 = 0,
            Comment1 = '', Comment2 = '',
            Comment3= 'AIX                                   ',
            File= '/build/slot1/p750_P/src/lib/remote/amqrsyna.c',
            Line= '1382'
   ----}! rrxError rc=rrcE_CLOSE_SCRATCHPAD_FAILED
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM MQ.
  Platforms affected:
  MultiPlatform
  ****************************************************************
  PROBLEM DESCRIPTION:
  A coding error meant that the IBM MQ channel agent process
  (amqrmppa) had the potential to enter an infinite loop during
  channel initialization.
  

Problem conclusion

• The IBM MQ queue manager code has been changed to prevent the
  possibility of an inifinite loop.
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  Version    Maintenance Level
  v8.1       8.1.0.6
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IT15705

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MQ FOR HPE NS O

• Fixed component ID

  5724A3904

Applicable component levels