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IT15705: WEBSPHERE MQ: ABNORMALLY HIGH CPU USAGE IN AMQRMPPA PROCESS.

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You can track all active APARs for this component.

 

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
    v7.5       7.5.0.8
    v8.0       8.0.0.6
    
    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 number

    IT15705

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7241

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-06-14

  • Closed date

    2016-07-28

  • Last modified date

    2017-03-10

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

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

    IT33903

Fix information

  • Fixed component name

    WMQ BASE MULTIP

  • Fixed component ID

    5724H7241

Applicable component levels

  • R750 PSY

       UP

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Document Information

Modified date:
26 August 2021