Bugs item #668786, was opened at 2003-01-15 17:07
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=376685&aid=668786&group_id=22866
Category: JBossMX
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 5
Submitted By: Steve Hayward (shayward)
Assigned to: Nobody/Anonymous (nobody)
Summary: LinkageError: loader constraints violated
Initial Comment:
I am using JDK1.3.1-b24 on Window 2000 pro.
here is the error I get when calling a EJB and it tries to
open a JDBC connection to a Oracle database:
2003-01-15 10:57:50,796 INFO
[org.jboss.system.server.Server] JBoss (MX
MicroKernel) [3.0.4 Date:200211021607] Started in
0m:22s:463ms
2003-01-15 10:58:44,242 ERROR
[org.jboss.ejb.plugins.LogInterceptor] Unexpected Error:
java.lang.LinkageError: loader constraints violated when
linking javax/sql/ConnectionEventListener class
=====
Now here is what my research has uncovered.
I am using Oracle therefore I have classes12.zip in the
lib directory.
I turned on DEBUG logging in conf/log4j.xml
I then run again and I see in the log that
javax.sql.ConnectionEventListener.class was found in 2
jars.
1. classes12.zip (Oracle JDBC drivers)
2. jboss-j2ee.jar
after some investigation I discovered that these interface
classes are different (they should be the same as Sun's
J2ee 1.2.1 version of them) so I download Sun's source
for j2ee1.2.1 and found that jboss version of
javax.sql.ConnectionEventListener.java is indeed
different from jboss's version of the same interface:
Sun's version of javax.sql.ConnectionEventListener
declares:
void connectionClosed...
void connectionErrorOccurred...
Jboss's version of javax.sql.ConnectionEventListener
declares:
public void connectionClosed
public void connectionErrorOccurred
I believe that I get the LinkageError because the Oracle
classes12.zip has the exact same copy as Sun's.
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