APAR status
Closed as program error.
Error description
Error Message: A segfault in libj9gc when trying walk all java.util.concurrent.locks.AbstractOwnableSynchronizer objects. . Stack Trace: N/A .
Local fix
Problem summary
java.lang.management.ThreadMXBean.getThreadInfo(...) walks the heap to get the list of ownable synchronizers and crashes because it might access a dead object.
Problem conclusion
This defect will be fixed in: 7.0.0 SR3 6.0.1 SR4 . GC has been updated to keep a collection of all live ownable synchronizers. ThreadMXBean has been updated to use that collection instead of walking the entire heap.
Temporary fix
Comments
APAR Information
APAR number
IV30058
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-10-12
Closed date
2012-10-12
Last modified date
2012-11-11
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
R260 PSY
UP
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Document Information
Modified date:
22 February 2022