APAR status
Closed as program error.
Error description
Error Message: NullPointerException in Unsafe.compareAndSwapInt, Unsafe.compareAndSwapLong, or Unsafe.compareAndSwapObject when the first parameter is NULL. This problem only affects P and Z platforms. . Stack Trace: N/A .
Local fix
This problem can be worked around by disabling the JIT compiler via the -Xint option. Note that this will have severe performance repercussions.
Problem summary
The JIT compiler generates an unnecessary NULL check on the first parameter of the compareAndSwap methods in the Unsafe class which results in a NullPointerException being thrown if the first parameter is NULL. A NULL first parameter is acceptable and NullPointerException should not be thrown if one is passed.
Problem conclusion
The JIT compiler has been corrected to not generate a NULL check in this case. . This APAR will be fixed in the following Java Releases: 7 R1 SR3 FP20 (7.1.3.20) 6 R1 SR8 FP15 (6.1.8.15) 8 SR2 (8.0.2.0) 7 SR9 FP20 (7.0.9.20) . 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
IV76872
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-09-09
Closed date
2015-09-09
Last modified date
2015-09-09
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
R260 PSY
UP
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Document Information
Modified date:
09 September 2015