APAR status
Closed as program error.
Error description
Error Message: Encoding Strings into BIG5, SHIFT-JIS, or EUC_KR is unexpectedly slow. . Stack Trace: N/A .
Local fix
Problem summary
A jit optimization called Loop Versioner is capable of producing a fast version of a loop that runs only if certain conditions are met. The optimizer elects to perform this transformation only in cases where those conditions are nearly always met, so we nearly never run the slow version of the loop. In this case, the jit erroneously concluded that a particular condition would nearly always be met, leading Loop Versioner to test that condition before entering the fast loop. At run time, the condition usually failed, causing the slow version of the loop to run.
Problem conclusion
The jit compiler has been modified to avoid optimizing rarely-executed bound checks from loops in this way, so that the fast copy of a loop does not require that those bound checks should succeed on every loop iteration. In particular, when a rarely executed bound check would fail but won't execute, the generated code will still run the fast loop. . This APAR will be fixed in the following Java Releases: 8 SR1 FP10 (8.0.1.10) . 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
IV75205
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-07-15
Closed date
2015-07-15
Last modified date
2015-07-15
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
R130 PSY
UP
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Document Information
Modified date:
15 July 2015