APAR status
Closed as program error.
Error description
Error Message: Under some circumstances a JIT code cache can get stuck in the reserved state, causing the JIT compiler to waste CPU cycles when the code cache is full and no useful compilation is possible. The problem can be confirmed by taking a JIT verbose log which will show many failed compiles with the following reason: code=FFFFFFFFFFFFFFF8 compilationCodeReservationFailure . Stack Trace: N/A .
Local fix
Increasing the size of the code cache may reduce the likelihood of the problem occurring. Setting a single code cache and only one compilation thread should avoid the problem, but may negatively impact application performance.
Problem summary
The problem is caused by code paths that don't reset the reserved flag on the code cache.
Problem conclusion
This defect will be fixed in: 6.0.1 SR8 7.0.0 SR7 . The JIT has been modified so that a code cache is not left in the reserved state.
Temporary fix
Comments
APAR Information
APAR number
IV51764
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-11-06
Closed date
2013-11-18
Last modified date
2014-01-03
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:
03 January 2014