IJ46956: AN INCREASE IN CPU CONSUMPTION AFTER APPLYING IJ32927 - THE PERMANENT FIX

APAR status

• Closed as program error.

Error description

• Error Message: NA
  .
  Stack Trace: NA
  .
  A temporary solution was introduced through APAR IJ35969 that
  includes a workaround to deactivate the fix for IJ32927 in order
  to address the issue with the system's performance. This current
  fix resolves the performance issue when the IJ32927 fix is
  activated..
  

Local fix

• N/A
  

Problem summary

• When the user method is invoked the latest user defined class
  loader (LUDCL) cache is refreshed at different points in the
  code by walking the stack, some of the points are called more
  ofter than where the LUDCL is actually needed. This causes the
  cache to be refreshed and perform a stackWalk more times than
  LUDCL is used.
  

Problem conclusion

• Remove the points of refresh where it is not required so a
  stackWalk is performed at most as many times the LUDCL is
  needed, or less if already cached.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM SDK, Java Technology Edition
     8    SR8 FP10  (8.0.8.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  maintenance can be found at:
             https://www.ibm.com/support/pages/java-sdk
  

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

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels