APAR status
Closed as program error.
Error description
Error Message: The JVM fails or gives wrong result while executing a JIT-compiled Java method due to a loop being iterated the wrong number of times. . Stack Trace: N/A .
Local fix
The problem can be avoided by using the -Xjit:disableLoopUnroller option
Problem summary
This problem is caused by an incorrect loop unrolling optimization. When calculating the number of loops, the optimization can pick up an incorrect value for certain unsigned values, resulting in the loop being unrolled an incorrect number of times.
Problem conclusion
This defect will be fixed in: 6.0.1 SR2 7.0.0 SR1 . The JVM is updated to properly detect the right number of loops for the scenario identified so that the optimization will unroll the loops correctly.
Temporary fix
Comments
APAR Information
APAR number
IV20275
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-04-26
Closed date
2012-04-26
Last modified date
2012-06-01
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
R260 PSY
UP
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Document Information
Modified date:
01 June 2012