IJ20714: A SIGSEGV/GPF IS RECEIVED FROM METHOD RESIZELOA()

APAR status

• Closed as program error.

Error description

• Error Message: A SIGSEGV/GPF is received
  .
  Stack Trace:
  {MM_MemoryPoolLargeObjects::resizeLOA(MM_EnvironmentBase*)}
  {MM_ParallelGlobalGC::internalPostCollect(MM_EnvironmentBase*,MM
  _MemorySubSpace*)}
  {MM_ConcurrentGC::internalPostCollect(MM_EnvironmentBase*,MM_Mem
  orySubSpace*)}
  {MM_Collector::postCollect(MM_EnvironmentBase*,MM_MemorySubSpace
  *)}
  {MM_Collector::garbageCollect(MM_EnvironmentBase*,MM_MemorySubSp
  ace*,MM_AllocateDescription*...}
  {MM_ConcurrentGC::concurrentMark(MM_EnvironmentBase*,MM_MemorySu
  bSpace*,MM_AllocateDescripti...}
  {MM_ConcurrentGC::payAllocationTax(MM_EnvironmentBase*,MM_Memory
  SubSpace*,MM_MemorySubSpace*...}
  {MM_MemorySubSpace::payAllocationTax(MM_EnvironmentBase*,MM_Memo
  rySubSpace*,MM_AllocateDescr...}
  {MM_MemorySubSpace::payAllocationTax(MM_EnvironmentBase*,MM_Memo
  rySubSpace*,MM_AllocateDescr...}
  {MM_MemorySubSpace::payAllocationTax(MM_EnvironmentBase*,MM_Memo
  rySubSpace*,MM_AllocateDescr...}
  {MM_MemorySubSpace::payAllocationTax(MM_EnvironmentBase*,MM_Allo
  cateDescription*)}
  {MM_AllocateInitialization::allocateAndInitializeObject(OMR_VMTh
  read*)}
  {OMR_GC_AllocateObject(OMR_VMThread*,MM_AllocateInitialization*)
  }
  {J9AllocateIndexableObject}
  {bytecodeLoop}
  {ZJ9SYM1}
  {sidecarInvokeReflectMethodImpl}
  .
  

Local fix

• use -Xnoloa as a workaround
  

Problem summary

• Resizing LOA attempt resulted in crash due incorrect calculation
  

Problem conclusion

• Problem has been fixed to ensure that resizing LOA calculations
  are correct
  .
  This APAR will be fixed in the following Java Releases:
     8    SR6 FP5   (8.0.6.5)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

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

• R270 PSY

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