PQ69273: JAVA.UTIL.CONCURRENTMODIFICATIONEXCEPTION RECEIVED DURING PLUGIN REGEN

 A fix is available

System Management Component Cumulative Fix for 4.0.2/4.0.3/4.0.4 /4.0.5



APAR status
Closed as program error.

Error description
At adminserver startup, multiple appservers are configured with
regen plugin on startup. This can result in a
ConcurrentModificationException.
Symptoms in the logs can be AEPluginCfg   W PLGN0063W: An
exception occurred while generating the plugin configuration
Exceptions in the tracefile are of the nature:Exception occurred
loading deployment descriptor for module examples.war.
Calls to getDeploymentInfo are not synchronized properly.
PLGN0063W plugin regen appserver WAS websphere
Local fix
Only set the slowest appserver with the config option
regen at startup or use
./GenPluginCfg.sh -adminNodeName <node_name>
Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server 4.0.4 and the   *
*                 problem could occur on prior 4.0 versions    *
****************************************************************
* PROBLEM DESCRIPTION: Concurrent start of two applications    *
*                      causes exceptions                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
User has automatic generation of plugin configuration data
enabled.  On a situation such as adminserver start, concurrent
start of two applications causes exceptions due to regen plugin
related failure.
Exception to expect: java.util.ConcurrentModificationException
Problem conclusion
The problem is caused by thread timing and the fix ensures
proper synchronization in a concurrent access scenario.
Temporary fix
packaged and posted stand-alone eFix on wasdoc0 for customer to
test.
Comments
APAR information
APAR number PQ69273
Reported component name WEBSPHERE AE SO
Reported component ID 5630A2202
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2002-12-18
Closed date 2003-01-13
Last modified date 2003-01-13

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
ADMINSVR          

SRLS

Fix information
Fixed component name WEBSPHERE AE SO
Fixed component ID 5630A2202

Applicable component levels
R400 PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ69273
IBM Group: Software Group
Modified date: Jan 13, 2003