APAR status
Closed as program error.
Error description
Error Message: Unhandled exception Type=Segmentation error vmState=0x00000000 . Stack Trace: Multiple stack traces are possible. Most commonly seen includes: Compiled_method=java/lang/invoke/MethodHandle.undoCustomizationL ogic(Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHand le;)V . The problem can only occur on Power machines
Local fix
No workaround available
Problem summary
According to the JVM Specification, when an object that has final fields is constructed by one thread, as soon as the pointer becomes available to other threads, those threads should see correct values of the final fields, as initialized by the constructor. In order to ensure that, on architectures with weak memory consistency model, the JIT compiler inserts a memory synchronization instruction after constructing objects with final fields. Under certain specific conditions such an instruction was not inserted which caused other threads to see the value of a final field not yet initialized by the constructor. This caused de-referencing a null pointer and therefore a segmentation fault.
Problem conclusion
This problem has been addressed by https://github.com/eclipse/openj9/pull/6628 . This APAR will be fixed in the following Java Releases: 8 SR5 FP40 (8.0.5.40) . 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
IJ18244
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-08-08
Closed date
2019-08-08
Last modified date
2019-08-08
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:
08 August 2019