class in rt.jar is not loaded by JBoss 7

[ohmygod]

I am using JBoss 7.1.1.Final and found a class from rt.jar cannot be loaded in runtime. From my experience, classes from rt.jar in jre should be able to be loaded anytime.

Could somebody advise why this problem happens and how to resolve it?

Caused by: java.lang.ClassNotFoundException: sun.beans.editors.StringEditor from [Module "deployment.demo.ear.demo.jar:main" from Service Module L
oader]
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:423)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) [rt.jar:1.6.0_07]

[ohmygod]

I added <path name="sun/beans/editors"/> to modules\sun\jdk\main\module.xml and it works. Could anybody explain to me why JBoss 7 needs all class packages to be configured in module xml?

[mac2009]

Mike, I agree with you. "From my experience, classes from rt.jar in jre should be able to be loaded anytime."

I have the same issue with com/sun/org/apache/xml/internal/serialize/XMLSerializer

Thats really a strange behaviour...

[sfcoy]

I believe this is a consequence of JBoss 7 trying to remain JVM agnostic. These classes may not exist in non SunOracle implementations, or even some future Oracle release.

[mac2009]

Ok, thats a valid point.

So, whas best practice?

In my case the ClassNotFound is caused by castor-xml. Should I add the xerces.jar as well?

Not sure, but I think that I have read something like "better remove xerces.jar (or xml-apis.jar) for example from lib dir"...?

[sfcoy]

What version of castor-xml are you using?

There's some interesting comments at http://www.castor.org/1.2/release-notes.html down just below the notes for Release 1.1-M3 regarding changes for Java 5, xerces and serialization.

Maybe you can spot some hints there. It certainly answers your last question I think. xml-apis.jar is evil and should never be deployed in an application BTW.

Speaking of evil, Mikes thread has now been hijacked...

[ohmygod]

Hi Stevephen,

Your opinion sounds reasonable. However, I have made it work by adding the classpath in the module xml. BTW, could you please take a look at my another question here

https://community.jboss.org/thread/202324

It is also about class loading problem. If you have any idea on it, it will be much appreciated.

[mac2009]

Hi Stephen,

we are using castor-xml 1.3.2.

I checked the notes for Release 1.1-M3. Castor uses xerces shipped with jdk/jre. Anyway, not the issue...

In general, whats the best way to do it ?

a) adding path element to module.xml (as Mike and have done so far)

b) adding jar (xerces for example) to ear/lib

c) matter of taste

Cheers

Carsten

[andyrooheavens]

For our EAR project we have the following for our jboss-deployment-structure.xml:

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.1">

<ear-subdeployments-isolated>false</ear-subdeployments-isolated>

<deployment>

  <dependencies>

   <system>

    <paths>

     <path name="com/sun/org/apache/xml/internal/serialize"/>

     <path name="sun/beans/editors"/>

    </paths>

   </system>

  </dependencies>

</deployment>

<sub-deployment name="xyz.war"/>

</jboss-deployment-structure>

This allows you to deploy the app without making changes to the (possibly shared with other teams) module.xml file.