PI34016: HIGH CPU CONSUMPTION

IBM Tivoli Composite Application Manager for Application Diagnostics V7.1 fixes
Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The loop is due to a recursive abend/retry in CYN1 code. This
  time it happened in CYN1KGSS module but similar recovery/retry
  logic is used in most CYN1 modules so it caused identical
  recursive abend. The cause of recursive  abend is due to the
  fact that we rely on contents of a certain register to be valid
  after the recovery but in reality we can't depend on that.
  
  SLIP SET,C=0C4,A=SVCD,JOBNAME=WAST337,JL=(WAST337,CYN1PROC),
  SDATA=PSA,CSA,LPA,RGN,SQA,SUM,SWA,TRT,ALLNUC,GRSQ),MATCHLIM=3,EN
  D
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of ITCAM for Application           *
  *                 Diagnostics on z/OS.                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: High CPU consumption happens in servant *
  *                      address space after the recoverable     *
  *                      abend in the CYN1 code.                 *
  ****************************************************************
  * RECOMMENDATION: Apply this PTF.                              *
  ****************************************************************
  High CPU consumption in servant address space is caused by
  a recursive abend in the CYN1 code.
  

Problem conclusion

• Code modified to print warning message in the native trace
  file (trace-dc-native.log) if CYN1 function abended.
  710Y
  CYNZCYND
  CYNZCY6D
  CYNZKYND
  CYNZKY6D
  CYNZLI14
  CYNZLI15
  CYNZLI16
  CYNZLI56
  CYNZLI66
  CYNZVERS
  

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:

  PI34471 UI25420

Modules/Macros

• CYNZCYND CYNZCY6D CYNZKYND CYNZKY6D CYNZLI14
  CYNZLI15 CYNZLI16 CYNZLI56 CYNZLI66 CYNZVERS
  

Fix information

• Fixed component name

  ITCAM WAS ZOS D

• Fixed component ID

  5698A7100

Applicable component levels

• R710 PSY UI25420

     UP15/02/26 P F502

Fix is available

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