APAR status
Closed as program error.
Error description
Error Message: ** ASSERTION FAILED ** at ParallelScavenger.cpp:2486: ((MM_Stack SlotValidator(MM_StackSlotValidator::NOT_ON_HEAP, *slotPtr, stac kLocation, walkState).validate(_env))) Stack Trace: The stack trace of the crash will likely include this routine: {libj9gc26.so}{doStackSlot__31MM_ParallelScavengerRootScannerFPP 8J9ObjectPvPCv}
Local fix
If the method associated with the bad O-slot can be determined from either the error log or snap trace output then the method can be excluded from JIT compilation using this option: -Xjit:exclude={package/classname.methodname(*}
Problem summary
Under some circumstances, the JIT could incorrectly analyze a code path involving an exception throw and catch, and could consequently generate code that does not always initialize a local object reference before the GC runs. The un-initialized value could then cause problems for GC.
Problem conclusion
The JIT compiler's live monitor analysis has been fixed so that throw-catch paths are processed accurately. . This APAR will be fixed in the following Java Releases: 7 R1 SR2 FP10 (7.1.2.10) 7 SR8 FP10 (7.0.8.10) 6 R1 SR8 FP3 (6.1.8.3) 6 SR16 FP3 (6.0.16.3) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV65284
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-09-25
Closed date
2014-11-27
Last modified date
2016-04-14
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI33621
Fix information
Fixed component name
JIT
Fixed component ID
620700124
Applicable component levels
R130 PSY
UP
R260 PSY
UP
R600 PSY
UP
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Document Information
Modified date:
14 April 2016