APAR status
Closed as program error.
Error description
Error Message: <OSB>ERR<CSB> Unhandled exception <OSB>ERR<CSB> Type=Segmentation error vmState=0x00000000 <OSB>ERR<CSB> J9Generic_Signal_Number=00000004 Signal_Number=0000000b Error_Value=24cf9248 Signal_Code=00000001 ... . Stack Trace: #12 <signal handler called> #13 0x7bebda54 in MM_CollectorLanguageInterfaceImpl::private_markingScheme_getRefe renceStatus(MM_EnvironmentStandard*, J9Object*, bool*, bool*) () from .../libj9gc29.so Cannot access memory at address 0x7b6be1a8 .
Local fix
This issue can be worked around using -Xgcworkpackets option to increase size of work packet so that the buffer overflow does not happen. The default size of the work packet is proportional to the heap size. For a 6 GB heap, the default size is 15725. In one situation, the overflow was avoided using -Xgcworkpackets50000. Note this will consume approximately 150 MB extra native memory.
Problem summary
The problem is caused when one of gc state has not been set for java thread during concurrent work packet overflow.
Problem conclusion
The JVM has been updated to prevent the crash from checking if gc state has been set before using it. . This APAR will be fixed in the following Java Releases: 7 R1 SR3 FP60 (7.1.3.60) 8 SR3 FP11 (8.0.3.11) . 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
IV87037
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-07-18
Closed date
2016-07-18
Last modified date
2016-09-13
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
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
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Document Information
Modified date:
21 February 2022