PK19063: WEBSPHERE NODEAGENT CONSUMES HIGH CPU

APAR status
Closed as program error.

Error description
The NodeAgent consumes high CPU.

The call stack seen for the thread taking high cycles:

"ORB.thread.pool : 47" (TID:0x304E8D78, sys_thread_t:
                        0x79D613A0, state:R,
                        native ID:0x10F13) prio=5
 at java.util.HashMap.get
 at com.ibm.ws.cluster.topography.DescriptionManagerA
    .getDescription
 at com.ibm.ws.cluster.propagation.DescriptionManagerImpl.update
 ...

This is due to unprotected accessing of a HashMap.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server version 5.0.2   *
*                 PME and 5.1.1 WBI users of WorkLoad          *
*                 Management (WLM)                             *
****************************************************************
* PROBLEM DESCRIPTION: ConcurrentModificationException in      *
*                      DescriptionManagerA                     *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The call stack seen for the thread taking high cycles:

"ORB.thread.pool : 47" (TID:0x304E8D78, sys_thread_t:
0x79D613A0, state:R,
native ID:0x10F13) prio=5
at java.util.HashMap.get
at com.ibm.ws.cluster.topography.DescriptionManagerA
.getDescription
at com.ibm.ws.cluster.propagation.DescriptionManagerImpl.update
...

This is due to unprotected accessing of a HashMap.
Problem conclusion
The methods in DescriptionManagerA were synchronized to
prevent the ConcurrentModificationException from occurring.
Temporary fix Comments
APAR information
APAR number PK19063
Reported component name WAS BASE 5.0
Reported component ID 5630A3600
Reported release 10A
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2006-02-02
Closed date 2006-03-06
Last modified date 2006-03-06

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
WLM          

Publications Referenced

Fix information
Fixed component name WAS BASE 5.0
Fixed component ID 5630A3600

Applicable component levels
R003 PSY    UP
R00A PSY    UP
R00H PSY    UP
R00I PSY    UP
R00P PSY    UP
R00S PSY    UP
R00W PSY    UP
R103 PSY    UP
R10A PSY    UP
R10H PSY    UP
R10I PSY    UP
R10P PSY    UP
R10S PSY    UP
R10W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 10A
Software edition:
Reference #: PK19063
IBM Group: Software Group
Modified date: Mar 6, 2006