IV63994: ASSERTION FAILURE OR SEGMENTATION FAULT OCCURS INTERMITTENTLY DURING J9HEAP ALLOCATION

APAR status

• Closed as program error.

Error description

• Error Message: ** ASSERTION FAILED ** at common/j9heap.c:186:
  ((chunkSize!=0))ORAn unhandled error (4) has
  occurred.J9Generic_Signal_Number=00000004Signal_Number=0000000b.
  .......
  .
  Stack Trace:
  j9heap_allocate()iterateHeapsAndSubAllocate()allocate_memory32()
  j9mem_allocate_memory32()
  .
  

Local fix

Problem summary

• Incorrect updation of j9heap related metadata under certain
  conditions resulting in either assertion failures or
  segmentation faults.
  

Problem conclusion

• j9heap related metadata is updated appropriately within the heap
  utility methods.
  .
  This APAR will be fixed in the following Java Releases:
     6    SR16 FP2  (6.0.16.2)
     7 R1 SR2       (7.1.2.0)
     6 R1 SR8 FP2   (6.1.8.2)
     7    SR8       (7.0.8.0)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, Java maintenance is available
  from:
             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

• R600 PSY

     UP

• R270 PSY

     UP

• R260 PSY

     UP