IJ47413: ASSERTION FAILURES WHILE USING SAMPLED OBJECT ALLOCATE EVENT

APAR status

• Closed as program error.

Error description

• Error Message: j9vm.225 ASSERTION FAILED ** at
  VMAccess.cpp:1163: (!((0 != (((currentThread->publicFlags)) &
  ((0x1000))))))
  .
  Stack Trace: #javaTrace()
  #acquireSafePointVMAccess()
  #redefineClassesCommon.isra.4()
  #jvmtiRetransformClasses()
  #retransformClasses()
  .
  

Local fix

Problem summary

• When using sampled object allocate event, JVMTI capability
  enables safe point OSR, but the event would be sent when not at
  an OSR safe point, leading to assertions or hangs
  

Problem conclusion

• The JVM has been updated disabling safe point OSR if sampled
  object allocate hook is used, thus preventing assertions.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     11              11.0.20.1 (z/OS)
     11              11.0.20.0 (Distributed)
     17              17.0.8.0
     8               8.0.382.0
  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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels