PQ71625: JVM HEAP GROWTH IN WEBSPHERE APPLICATION SERVER V4.01 Z/OS

 A fix may be available

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APAR status
Closed as program error.

Error description
Customer experiences a growth in JVM heap usage when running
applications under load. This can be attributed to WebSphere
not properly cleaning up after a request is driven.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V4.0.1 for z/OS and OS/390.                  *
****************************************************************
* PROBLEM DESCRIPTION: Customer experiences a growth in JVM    *
*                      heap usage when running applications    *
*                      under load. This can be attributed to   *
*                      WebSphere not properly cleaning up      *
*                      after a request is driven.              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The webrequest to a J2EEServer is invoked by the
RemoteWebContainerBean's dispatchByURI method.
The RemoteWebContainerBeans are stateless session beans and
are reusable, but there are instances when these beans are
destroyed. When these beans are destroyed there are some
objects which have strong references which are never destroyed
by the JVM. This is causing the memory leak.
Problem conclusion
The objects which are not Garbage collected by the JVM are
explicitly released when the RemoteWebAppBean is destroyed.

APAR PQ71625 is associated with SERVICE LEVEL W401502 of
WebSphere Application Server V4.0.1 for z/OS and OS/390.
Temporary fix Comments
APAR information
APAR number PQ71625
Reported component name WEBSPHERE OS/39
Reported component ID 5655A9800
Reported release 401
Status CLOSED PER
PE NoPE
HIPER YesHIPER
Submitted date 2003-03-03
Closed date 2003-03-21
Last modified date 2003-04-03

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
EJSJWCSC EJSJWCWC        

Fix information
Fixed component name WEBSPHERE OS/39
Fixed component ID 5655A9800

Applicable component levels
R401 PSY UQ75293    UP03/03/29 P F303

  Fix is available
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Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 401
Software edition:
Reference #: PQ71625
IBM Group: Software Group
Modified date: Apr 3, 2003