APAR status
Closed as program error.
Error description
Error Message: A Java application throws an unexpected "java.lang.ArithmeticException: divide by zero". . Stack Trace: So far the only report has been with the GNU Trove library, e.g. java.lang.ArithmeticException: divide by zero at gnu.trove.impl.hash.TObjectHash.insertKeyRehash(TObjectHash.java :312) at gnu.trove.impl.hash.TObjectHash.insertKey(TObjectHash.java:294) at gnu.trove.map.hash.TObjectIntHashMap.put(TObjectIntHashMap.java: 239) etc However failures in other packages are possible. .
Local fix
The problem can be avoided by disabling the LoopVersioner optimisation on the problem methods, and also preventing those methods from being inlined. e.g. to disable the optimisation for all methods in the gnu.trove package tree the following Xjit option can be used: -Xjit:dontInline={gnu/trove/*},{gnu/trove/*}(disableLoopVersione r) Alternatively, and at slightly higher overhead, the optimisation can be disabled globally with -Xjit:disableLoopVersioner
Problem summary
Under some circumstances an unusually constructed loop causes one of the loop optimisations to miscalculate a constant used as part of the transformation, resulting in a hard-coded division by zero in the generated code.
Problem conclusion
The loop optimisation has been corrected. . This APAR will be fixed in the following Java Releases: 8 SR5 FP15 (8.0.5.15) 7 SR10 FP25 (7.0.10.25) 7 R1 SR4 FP25 (7.1.4.25) 6 R1 SR8 FP65 (6.1.8.65) . 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
IJ06000
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-04-24
Closed date
2018-04-24
Last modified date
2018-06-05
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
[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSC9HBA","label":"Just In Time (JIT) Compiler"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"130","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
05 June 2018