OA65183: HIGH CPU ON AUTHWXX TASK AFTER CPC MCL MAINTENANCE IS APPLIED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• AUTHWXXX tasks encounter High CPU in INGCHW00 after CPC MCL
  maintenance is applied.
  The High CPU can occur if Suspend/Resume is used or not.
  

Local fix

• Stop the AUTHWxxx taskcausing the loop (using NCCF-command 'STOP
  TASK=autotask’). The task should automatically restart.
  If this does not resolve the high CPU, recycle the SA Agent.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM Z System Automation V4R3    *
  *                 or V4R2 using Processor Operations and/or    *
  *                 the SA BCPii INTERNAL interface.             *
  ****************************************************************
  * PROBLEM DESCRIPTION: High CPU usage of NetView after MCL     *
  *                      upgrade due to looping AUTHWxxx         *
  *                      autotasks                               *
  ****************************************************************
  After applying MCL upgrades with a subsequent restart of the
  SE AUTHWxxx autotasks started looping in INGHWCOM, sometimes
  accompa-nied with the autotask being throttled by NetView
  because the inter-nal MAXCPU limit was hit (indicated by
  msg BNH161I).
  This led to situations that NetView was consuming up to 40%
  of the overall system CPU leaving not much room for other
  applications to be dispatched in an orderly manner.
  The autotask or NetView had to be recycled to overcome
  the situation.
  

Problem conclusion

• The event handler routine of the hardware interface module has
  been corrected; an unnecessary loop while waiting for events
  sent from the HW has been eliminated.
  Furthermore, handling of unknown events has been improved, so
  raw event data are being dumped to NetLog in case such unknown
  event da-ta are received.
  To reduce the looping potential in case of a massive number of
  unknown events being sent a 1 second wait has been introduced.
  

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:

  UJ93489 UJ93490

Modules/Macros

• INGCHW00 INGHW0VN
  

Fix information

• Fixed component name

  SYSTEM AUTO Z/O

• Fixed component ID

  5698SA300

Applicable component levels

• R420 PSY UJ93490

     UP23/08/15 P F308

• R430 PSY UJ93489

     UP23/08/15 P F308

Fix is available

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