PM50225: WLM OUTOFMEMORY OR MEMORY LEAK ON PROXY SERVER

Fixes are available

APAR status

Closed as program error.

Error description

The number of com/ibm/ws/cluster/selection/rule/RuleEtiquette
objects is growing steadily and might cause memory leak

For example, the number of objects are:
heapdump  instances    date

0001.phd     631       28 May
0005.phd    6769        7 June
0009.phd   10081       19 June

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server Network Deployment edition           *
****************************************************************
* PROBLEM DESCRIPTION: Increasing numbers of workload          *
*                      managemetn (WLM) runtime objects        *
*                      could eventually cause an               *
*                      out-of-memory condition in proxy        *
*                      servers.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Java heap dumps may show as a leak suspect class
com.ibm.ws.cluster.selection.rule.RuleEtiquette, and heap
analysis could show a large number of objects RuleEtiquette,
SelectionAdvisor, and SelectionCriteriaImpl.

Problem conclusion

In the 6.1, 7.0 and 8.0 fixpack releases, logic was added
to avoid duplicate entries in a cache of
com.ibm.wsspi.cluster.adapter.channel.ChannelTarget instances.
 This will keep the number of related objects such as
SelectionAdvisor, SelectionCriteriaImpl and RuleEtiquette to a
minimum.

Also in the 6.1, 7.0 and 8.0 fixpack releases, logic was added
to dramatically reduce the size of RuleEtiquette objects when
WLM tracing is not enabled.

In the 6.1 and 7.0 fixpack releases, an additional change was
made to further avoid memory leaks in a proxy server.  This is
a back-port of an 8.0.0.1 change to add synchronization around
the instantiation of SelectionAdvisor instances, in order to
prevent duplicate instances and therefore duplicate entries in
a HashMap.

In the 6.1 fixpack release, an additional change was made to
fix the equals() method on
com.ibm.wsspi.cluster.selection.rule.EndPointRule.  This is a
back-port of PM16868.

The fix for this APAR is currently targeted for inclusion in
fix packs 6.1.0.43, 7.0.0.23 and 8.0.0.3.  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
PM50225
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
61I
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-10-18
Closed date
2011-12-21
Last modified date
2012-04-20

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
R800 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:
28 October 2021

Tips

PM50225: WLM OUTOFMEMORY OR MEMORY LEAK ON PROXY SERVER

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

R800 PSY

Document Information

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