APAR status
Closed as program error.
Error description
Error Message: Performance degradation after migrating to Java 7 and above. . Stack Trace: N/A .
Local fix
Problem summary
The problem is caused when classes are loaded using java.net.URLClassLoader which use sun.misc.URLClassPath where cache is disabled that results in jar files being opened/closed large number of times.
Problem conclusion
The JVM has been modified to avoid closing/opening jar files on classpath multiple times. . This APAR will be fixed in the following Java Releases: 7 SR10 FP10 (7.0.10.10) 7 R1 SR4 FP10 (7.1.4.10) 8 SR4 FP10 (8.0.4.10) . 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
IV98370
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-07-24
Closed date
2017-07-24
Last modified date
2017-07-24
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
JAVA CLASS LIBS
Fixed component ID
620700130
Applicable component levels
R700 PSY
UP
R800 PSY
UP
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Document Information
Modified date:
21 February 2022