IZ76302: JVM CRASH WITH -XDUMP:STACK:EVENTS=ALLOCATION,FILTER=##

APAR status

• Closed as program error.

Error description

• Error Message: Crash happens only when the following option is
  used by the JVM
  -Xdump:stack:events=allocation,filter=#3m
  .
  
  Native Stack Trace:
  MM_MemoryPoolAddressOrderedList::collectorAllocateTLH(MM_Environ
  mentModron*,MM_AllocateDesc...
  MM_MemorySubSpaceGeneric::collectorAllocateTLH(MM_EnvironmentMod
  ron*,MM_Collector*,MM_Alloc...
  MM_ParallelScavenger::reserveMemoryForAllocateInSemiSpace(MM_Env
  ironment*,unsigned long,uns...
  MM_ParallelScavenger::copyAndForward(MM_Environment*,J9Object**)
  MM_ParallelScavenger::completeScan(MM_Environment*)
  MM_ParallelScavenger::workThreadGarbageCollect(MM_Environment*)
  MM_ParallelScavengeTask::run(MM_EnvironmentModron*)
  dispatcher_slave_thread_proc2
  j9sig_protect
  dispatcher_slave_thread_proc
  thread_wrapper
  CEEVROND
  CEEOPCMM
  
  Keywords:
  J9GCModronLinkedFreeHeader
  Allocation failure
  

Local fix

• Remove the -Xdump:stack:events=allocation,filter=## option
  

Problem summary

• JVM abends with the -Xdump:stack:events=allocation,filter=##
  option under load situations. This option is used to dump the
  stacks of threads that allocate an object of size greater than
  or equal to the value specified in the dump option.
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR12
  6.0.0 SR9
  .
  JVM has been updated to prevent the crash that happens in the
  presence of Xdump:stack option.
  .
  To obtain the fix:
  Install build 20100529 or later
  

Temporary fix

• 1. Remove -Xdump:stack:events=allocation,filter=## option from
  the Java option list.
  2. "-Xdump:stack:events=allocation,filter=#3m,request="
     Using this option may not produce the problem.
  

Comments

APAR Information

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

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

  IZ76322

Fix information

• Fixed component name

  JAVA 5 J9 COMMO

• Fixed component ID

  620500127

Applicable component levels

• R500 PSN

     UP