APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: N/A . An input packed decimal with an even number of digits is passed as an argument to the checkPackedDecimal() method call. The nibble proceeding its top (most significant digit) nibble was an invalid digit. Also, the overwrite boolean argument to this method call was set as true. The expected return value was 0 (indicating a valid packed decimal), but the function returned 2 for invalid digits. This problem is on z14 only.
Local fix
N/A
Problem summary
The problem is caused by the JIT evaluator not emitting correct z14 instructions to validate and modify even-precision packed decimal inputs. If a packed decimal input has an even number of digits, there will be an extra nibble loaded from memory for processing. This extra top nibble is not part of the input and could contain corrupted non-zero data. This top nibble should be cleared before performing the testPackedDecimal() step. But the instructions produced by the JIT failed to zero-out the invalid top nibble and returns 2 for invalid inputs.
Problem conclusion
A JIT bug fix has been delivered to emit correct z/Architecture instructions to fix the problem by zeroing out extra top nibble if the input to testPackedDecimal() is an even-precision packed decimal. . This APAR will be fixed in the following Java Releases: 8 SR5 FP5 (8.0.5.5) . 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
IJ01928
Reported component name
JIT
Reported component ID
620700124
Reported release
130
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-11-15
Closed date
2017-11-15
Last modified date
2017-11-15
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
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Document Information
Modified date:
15 November 2017