Fixes are available
PI34674: SHIP JDK IV69354 AS AN IFIX FOR WAS 8.0
PI34784: SHIP JDK IV69354 AS AN IFIX FOR WAS 7
PI35615: SHIP JDK IV69354 IV69616 FOR JAVA 626 AS AN IFIX FOR WAS 8.5
PI37006: SHIP JAVA 6/26 SR8 FP3 + IV69354+IV69616+IV68447+IV70681 FOR WAS 8555
PI37009: SHIP JAVA 6/26 SR8 FP2 + IV68447+IV69354+IV66608+IV66375+IX90155+IV66944+IV66991+IV70681 for WAS 8554
PI37010: SHIP JAVA 6/26 SR8 FP2 + IV68447+IV69354+IV66608+IV66375+IX90155+IV66944+IV66991+IV70681
PI37013: SHIP JAVA 6 SR16 FP3 + IV69354+IV70681 FOR WAS 70037
PI37014: SHIP JAVA 6 SR16 FP1 + IV64658+IV64659+IV70681 FOR WAS 70035
PI38186: Ship Java 6/26 SR8 FP3 +IV69354+IV69616+IV68447+IV70681 for WAS800x
PI42772:
APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: N/A . Performance benchmark test shows a regression of 7% with java 6 SR16 FP2 & 6.0.1 SR8 FP2 compared to java 6 SR16 FP1 & 6.0.1 SR8 FP1. The performance regression is observed in all platforms.
Local fix
Problem summary
In Java 6 implementation, Introspected java beans are stored in a cache (WeakHashMap whose value is stored as WeakReference) which clears the entries when there is no strong reference. Because of this, beanclass is re-introspected when lookup for BeanInfo happens in cache again and again.
Problem conclusion
JDK has been updated to modify the cache implementation which now use LRUCache along with WeakHashMap thus reduce the no.of times re-introspection happens. . This APAR will be fixed in the following Java Releases: 6 R1 SR8 FP4 (6.1.8.4) 6 SR16 FP4 (6.0.16.4) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV69354
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-02-10
Closed date
2015-03-20
Last modified date
2015-07-15
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI49919
Fix information
Fixed component name
JAVA CLASS LIBS
Fixed component ID
620700130
Applicable component levels
R600 PSY
UP
Document Information
Modified date:
08 January 2022