PQ55617: JAVA.IO.UTFDATAFORMATEXCEPTION RUNNING MULTIPLE EJB CLIENTS

APAR status
Closed as program error.

Error description
java.io.UTFDataFormatException in EJB client running
multiple threads. This appears to be a timing problem in the
WLM code.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All WebSphere Application Server users       *
*                 of Version 4.0 / 4.0.1 that use WLM.         *
****************************************************************
* PROBLEM DESCRIPTION: Client side WLM problem where a         *
*                      java.io.UTFDataFormatException          *
*                      is reported.                            *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When a WLM client sends each request, a "version"
(epoch) value is sent along with the request to represent
how current the Server Group information is.
Problem conclusion
The epoch value is put into a hashtable with the thread name
as the key. It was realized that this wasn't a unique
enough key value. So the fix was to use the thread object
reference as the key which worked.
Temporary fix Comments
APAR information
APAR number PQ55617
Reported component name WEBSPHERE AE NT
Reported component ID 5630A2201
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2001-12-07
Closed date 2001-12-18
Last modified date 2001-12-18

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
WLM          

Fix information
Fixed component name WEBSPHERE AE NT
Fixed component ID 5630A2201

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 #: PQ55617
IBM Group: Software Group
Modified date: Dec 18, 2001