APAR status
Closed as program error.
Error description
Error Message: A variety of error messages are possible, depending on the memory corruption caused by the faulty array copy. . Stack Trace: .
Local fix
-Xjit:disableIdiomRecognition prevents the error. Any resulting performance impact can be mitigated by limiting this option to the problematic methods.
Problem summary
The JIT compiler recognizes a data-copying loops and replaces them with faster bulk copy operations. Occasionally, the compiler would do this incorrectly in cases where the destination array reference would change during the loop. The resulting bulk copy operation moved data to the wrong location in memory.
Problem conclusion
The compiler has been changed to leave data-copying loops unaltered whenever the array references can change during the loop. This preserves the original correct behaviour of the loop. . This APAR will be fixed in the following Java Releases: 6 R1 SR8 FP4 (6.1.8.4) 8 SR1 (8.0.1.0) 7 R1 SR3 (7.1.3.0) 6 SR16 FP4 (6.0.16.4) . 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 number
IV72270
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-04-15
Closed date
2015-04-15
Last modified date
2015-04-15
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
R130 PSY
UP
R600 PSY
UP
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Document Information
Modified date:
15 April 2015