Thanks Mike and Edson for the reply.
I read from dev2dev and Weblogic bug
tracker that Weblogic Jar has older version of antlr and only in 8.1.6 and 9.2
that they have fixed this problem. So the workaround is to put the jar in pre
classpath before weblogic jar and it works. I am replying so that others can
find it useful if they come across this.
|
Change Request
Number
|
Description and
Workaround or Solution
|
Found In
|
Fixed In
|
|
CR236708
|
An Antlr conflict
exists between Hibernate 3 or Jboss loading of antlr jar and WebLogic Server.
Workaround
or Solution:
Place Antlr2.7.5.jar
before weblogic.jar in your CLASSPATH.
|
8.1SP05, 9.0
|
9.2
|
-Uday
From: Michael Neale
[mailto:michael.neale@xxxxxxxxx]
Sent: Friday, December 15, 2006
7:03 AM
To: user@xxxxxxxxxxxxxxxxxxx
Subject: Re: [drools-user] Reading
Rules file inside application server a problem
Weblogic certainly does.
I remember with versions of hibernate, you had to put antlr at the front of the
system classpath, or else use a locally scoped classloader.
Probably teh same here (with the antlr 2.x file, not the 3.x one).
On 12/15/06, Edson
Tirelli <tirelli@xxxxxxxx>
wrote:
Uday,
Some application servers also use antlr... I don't know about
WebLogic. It may be worth to check if there is no jar conflict happening
with another antlr/stringtemplate jar version that is eventually used by
WebLogic.
A simple way to test it would be to isolate the EAR classloader.
In
Jboss this is done in deployment descriptor, in WebSphere there is a
configuration you set when deploying the EAR, but I don't know about
WebLogic.
Hope it helps.
[]s
Edson
Uday Kamath wrote:
>Using Weblogic 8.1.3 and Jboss Rules 3.0.5
>Created an EAR file with a Session Bean invoking reading of Rule file
>which is also in the ear file.
>When the file is read and package is built it throws
>CharScanner;
>panic:ClassNotFoundException:org.antlr.stringtemplate.language.ChunkToke
>n
>
>In the ear file there is stringtemplate-2.3b6.jar which has this Class.
>I looked at the CharScanner code and it uses Thread context class loader
>to load the class. So theoretically this should have worked, but it
>doesn't anyone has any clues?
>
>Thanks in anticipation
>Uday
>
>
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--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11
9218-4151
JBoss, a division of Red Hat @ www.jboss.com
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