APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: TR_TreeTop::getEnclosingBlock(bool) CISCTransform2CopyingTROx(TR_CISCTransformer*) ... . The JVM receives a segmentation fault. On AIX the JIT compiler hangs with high CPU usage instead. In Java 7, 6.1, and 6, this problem only occurs on z/Architecture.
Local fix
The issue can be avoided with -Xjit:disableIdiomRecognition. This option has some performance impact, but it may be restricted to the problematic method.
Problem summary
An optimization in the JIT compiler recognized a loop and attempted to transform it into a specialized sequence of instructions. The particular loop had a highly specific unanticipated sequence of intermediate code that caused the transformation to fail.
Problem conclusion
The compiler has been modified so that it will identify loops that are problematic in this way and avoid transforming them. . This APAR will be fixed in the following Java Releases: 8 SR3 FP10 (8.0.3.10) 6 SR16 FP30 (6.0.16.30) 6 R1 SR8 FP30 (6.1.8.30) 7 R1 SR3 FP50 (7.1.3.50) 7 SR9 FP50 (7.0.9.50) . 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
IV85347
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-05-31
Closed date
2016-05-31
Last modified date
2016-05-31
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
R130 PSY
UP
R600 PSY
UP
R260 PSY
UP
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Document Information
Modified date:
31 May 2016