APAR status
Closed as program error.
Error description
Error Message: A VCVBG instruction throws a data exception (0C7 abend on z/OS - SIGFPE on Linux on Z). . Stack Trace: The problematic instructions come from usage of the Data Access Accelerator (DAA) API, specifically com/ibm/dataaccess/DecimalData.convertPackedDecimalToLong_(<OSB> BIIZ)J . This problem can only happen on IBM Z on z14 or later systems. The problem is introduced in Java 8 SR5.
Local fix
-Xjit:disableIntrinsics Note: this will turn off DAA optimizations decreasing performance of the DAA API.
Problem summary
An off-by-one error is made in the JIT compiled instructions associated with com/ibm/dataaccess/DecimalData.convertPackedDecimalToLong_(<OSB> BIIZ)J A vector load instruction VLRLR loads one more least significant byte than it should which means the data is invalid and likely contains an invalid sign bit in BCD format. When the subsequent VCVBG instruction tries to operate on the data it throws a data exception as a result of the invalid sign bit.
Problem conclusion
This problem has been fixed by https://github.com/eclipse/openj9/pull/29 . This APAR will be fixed in the following Java Releases: 8 SR5 FP10 (8.0.5.10) . 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
IJ10871
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-10-29
Closed date
2018-10-29
Last modified date
2018-10-29
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:
29 October 2018