[jboss-user] [Beginners Corner] - Yet another isolated classloader question
do-not-reply at jboss.com
Fri Sep 26 15:04:08 EDT 2008
I am trying to create a simple web app built with Maven. Maven by default will package all dependencies in the WAR, which causes classloader issues if those libraries are also already in JBoss.
Ok, so I thought classloader isolation solved this problem, but apparently I'm not understanding it correctly. The error is that ELResolver was already loaded (the el-api JAR is in my WAR under /WEB-INF/lib):
| Caused by: java.lang.ClassNotFoundException: Unexpected error during load of: javax.el.ELResolver, msg=loader constraint violation: loader (instance of org/jboss/mx/loading/UnifiedClassLoader3) previously initiated loading for a
| different type with name "javax/el/ELResolver"
| at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:560)
| at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
| at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
| at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Here's my jboss-web.xml. My understanding was that this means I get an isolated classloader that will use the classes in my WAR only and not those of the app server:
| <?xml version="1.0" encoding="UTF-8"?>
| <!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.4//EN"
What am I doing wrong? Am I absolutely forced to remove this JAR from my WAR? I have a similar problem with an EAR but this is a much simpler example. Thanks in advance for the help.
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