APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: N/A . after setting collection threshold on the memory pool, MEMORY_COLLECTION_THRESHOLD_EXCEEDED notification is always triggered, even if there is no low memory case. It happens on Java 8 SP5 or later.
Local fix
add -XX:+HeapManagementMXBeanCompatibility option in command line to avoid the problem
Problem summary
the collection threshold has been checked after every GC, even the GC does not try to reclaim the memory pool (regularly the memory pool would reach to full before triggering the related GC to reclaim the memory). It would cause the notification to be possibly triggered every time before the GC attempts to reclaim from the memory pool.
Problem conclusion
MXBeans code has been updated to only check the collection threshold after GC reclaims the memory from the memory pool. . This APAR will be fixed in the following Java Releases: 8 SR6 FP10 (8.0.6.10) . 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
IJ15356
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
2019-04-09
Closed date
2020-02-26
Last modified date
2020-02-26
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