APAR status
Closed as program error.
Error description
Error Message: An unexpected IncompatibleClassChangeError is thrown from a JIT-compiled method. In a different manifestation, an incorrect ArrayIndexOutOfBoundsException is also thrown. . Stack Trace: N/A . Methods with loops in them are susceptible to this problem.
Local fix
-Xjit:disableLoopVersioner
Problem summary
During the JIT compilation of a method with hot loops, an optimization called loop versioning incorrectly moves some code outside of a loop, along with variables that are loop-variant. This causes the resulting compiled method to behave in an unexpected manner.
Problem conclusion
This defect will be fixed in: 7.0.0 SR4 6.0.1 SR5 6.0.0 SR13 5.0.0 SR16 . The JIT compiler has been modified to correctly identify the code paths and variables which qualify for moving outside of the loop.
Temporary fix
-Xjit:disableLoopVersioner
Comments
APAR Information
APAR number
IV32630
Reported component name
JIT
Reported component ID
620700124
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-11-27
Closed date
2012-12-06
Last modified date
2013-10-16
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
JIT
Fixed component ID
620700124
Applicable component levels
R600 PSY
UP
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Document Information
Modified date:
16 October 2013