RE: [Obe-developer] Startas java.lang.LinkageError

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Good Day tecsee,

I haven't managed to deploy OBE on JBoss 4.0.3 successfully as yet, if I =
recall correctly the JBoss 4.0.3 installer did not produce a usable app =
server installation under Linux (the primary OBE development platform is =
JBoss on Fedora Core Linux). The problem you're seeing is lamentably =
common, and it is caused by the fact that the javax.xml.namespace.QName =
class is contained in multiple jar files which tend to get loaded in =
different orders by different ClassLoaders. This results in multiple =
copies of different versions of the class being loaded, which of course =
are incompatible with one another. Whenever I've seen a problem like =
this I've had to identify the jar containing the offending version and =
either remove it or change the JAR order in manifest Class-Path entries.

Are you running under JDK 1.5? You might want to try JDK 1.4 because JRE =
1.5 lib/rt.jar contains the jx.x.ns.QName class as well, but the JBoss =
UnifiedClassLoader3, when EAR-scoped (as OBE's is, to avoid crosstalk =
with other deployed applications),  may be finding a different version =
in a JAR or EAR because it does not follow the normal =
parent-classloader-first delegation pattern.

Thanks,

Adrian Price
Architect & Lead
The Open Business Engine
mailto:adr...@us...

"tenax propositi, altiora peto"

-----Original Message-----
From: obe...@li... =
[mailto:obe...@li...] On Behalf Of tecsee
Sent: Wednesday, April 19, 2006 5:53 AM
To: obe-developer
Subject: [Obe-developer] Startas java.lang.LinkageError

Hello,

I am seeing some exceptions being thrown during obe startas .=20
The following is a portion of the log file during startup.=20
I did not include all of the exceptions since there are so many of them.

----------------------------
11:10:00,593 INFO  [EJBDeployer] Deployed: =
file:/D:/application/jboss4.0.3/serve
r/default/tmp/deploy/tmp41097obeserver.ear-contents/obeserver-ejb.jar
11:10:00,718 INFO  [TomcatDeployer] deploy, ctxPath=3D/obeexamples, =
warUrl=3D.../tmp =
/deploy/tmp41097obeserver.ear-contents/obeexamples-exp.war/
11:10:01,578 ERROR [[/obeexamples]] StandardWrapper.Throwable
java.lang.LinkageError: loader constraints violated when linking =
javax/xml/names pace/QName class
        at org.wfmc.sample.CreditInfo.<clinit>(CreditInfo.java:109)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:217)
        at org.apache.axis.utils.ClassUtils$2.run(ClassUtils.java:176)
        at java.security.AccessController.doPrivileged(Native Method)
        at =
org.apache.axis.utils.ClassUtils.loadClass(ClassUtils.java:160)
        at org.apache.axis.utils.ClassUtils.forName(ClassUtils.java:100)
        at =
org.apache.axis.deployment.wsdd.WSDDTypeMapping.getLanguageSpecificTy
pe(WSDDTypeMapping.java:183)
        at =
org.apache.axis.deployment.wsdd.WSDDService.deployTypeMapping(WSDDSer
vice.java:542)
----------------------------

How to resolve this  question?

Anyone could help me?
Thanks in advance.

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