PK78291: MEMORY LEAK OCCURS CAUSED BY JMSMANAGEDCONNECTION OBJECTS

Fixes are available

APAR status

Closed as program error.

Error description

A memory leak occurs when using Message Driven Beans and
WebSphere MQ JMS.  The Object that causes the leak is called
JMSManagedConnection.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of WebSphere Application Server   *
*                  using WebSphere MQ (WMQ) messaging          *
****************************************************************
* PROBLEM DESCRIPTION: A memory leak occurs when using         *
*                      Message Driven Beans and WMQ.  The      *
*                      leak is caused by the                   *
*                      JMSManagedConnection object.            *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
A memory leak occurs when using Message Driven Beans and WMQ.
Inspection of the heap reveals that there are a large number
of JMSManagedConnection objects.  The cause of the leak is
that the hashCode for that Object can change which means that
it will leak from a hash based Collection.

Problem conclusion

To prevent the leak, the hashCode for JMSManagedConnection is
calculated once and fixed for the lifetime of the instance.

The fix for this APAR is currently targeted for inclusion in
fixpack 6.1.0.25 and 7.1.0.5.  Please refer to the Recommended
Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PK78291
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
61A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-01-08
Closed date
2009-03-05
Last modified date
2009-03-05

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
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R61A PSY
UP
R61H PSY
UP
R61I PSY
UP
R61P PSY
UP
R61S PSY
UP
R61W PSY
UP
R61Z PSY
UP
R700 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK78291: MEMORY LEAK OCCURS CAUSED BY JMSMANAGEDCONNECTION OBJECTS

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R61A PSY

R61H PSY

R61I PSY

R61P PSY

R61S PSY

R61W PSY

R61Z PSY

R700 PSY

Document Information

Share your feedback

Need support?