jboss-fuse-6.0.0.redhat-024 issue with commons logging

[kishor_pawar89]

Hi,

I am using jboss-fuse-6.0.0.redhat-024. I am facing deployment issues while deploying JBI service assembly. The Service assembly is using Spring 3.2.0.RELEASE and Hibernate 4.2.0.Final. I have attached log file.

I get the below error while deploying the service assembly.

Caused by: java.lang.LinkageError: loader constraint violation: when resolving field "logger" the class loader (instance of org/apache/xbean/classloader/JarFileClassLoader) of the referring class, org/springframework/transaction/support/AbstractPlatformTransactionManager, and the class loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) for the field's resolved type, org/apache/commons/logging/Log, have different Class objects for that type

[ffang]

Hi,

The error generally means the class was loaded by different class loaders

To deploy the JBI SA into OSGi container, your SA shouldn't embed third party jars like commons logging,  it should refer the one already installed in OSGi container.

To refer a class which already installed in container in your SA/SU, you need add something like

<classpath>

  <library>osgi:Bundle-SymbolicName</library>

</classpath>

to the xbean.xml of your SU, take a look a similar discussion[1] to get more details

[1]http://servicemix.396122.n5.nabble.com/Service-4-JBI-amp-3rd-Party-Libs-td5715490.html

Freeman

[kishor_pawar89]

Many thank Freeman.issue resolved.

[kishor_pawar89]

Hi,

<classpath>

  <library>osgi:Bundle-SymbolicName</library>

</classpath>

As we have added the above  in the camel context ,we get a XML validation error as below:

Type
cvc-complex-type.2.4.a: Invalid content was found starting with element 'classpath'. One of '{"http://www.springframework.org/schema/beans":description, "http://www.springframework.org/schema/beans":import, "http://www.springframework.org/schema/beans":alias, "http://www.springframework.org/schema/beans":bean, WC[##other:"http://www.springframework.org/schema/beans"], "http://www.springframework.org/schema/beans":beans}' is expected. camel-context.xml /ssa/camel-routing-service-unit/src/main/resources line 45 XML Problem.

Do we need to add any namespace or XSD?

[ffang]

Hi,

No, you can't add

<classpath>

  <library>osgi:Bundle-SymbolicName</library>

</classpath>

into camel context, it's only applicable in JBI SU's xbean.xml.

Freeman

[kishor_pawar89]

Hi,

We dont have xbean.xml in our project .

Could let us know about the other alternatives where we can place the above piece of code.

I have attached my JBI code. pls. have a look.

[ffang]

Hi,

Per the previous discussion, you are using JBI, right? How you define your SA/SU?

Freeman

[kishor_pawar89]

Can you please look at the code..just attched before your last immediate reply.

[ffang]

Hi,

Sorry somehow miss your poc.zip.

Well, from your testcase I can't see any reason you use JBI SA/SU to wrap your camel router, it's just camel router and you can simply put it into a bundle and so use maven-bundle-plugin to help you generate required OSGi metadata header.

JBI is kind of dead and we even don't suggest to use it now, so please simply put camel router as a normal bundle and forget the JBI classloader tricky in OSGi container as I don't see any reason you need JBI from your testcase.

HTH

Freeman

[kishor_pawar89]

Hi,

we are confined to usage of JBI with Service mix as a part of project requirement and  cannot eliminate its involvment.Any suggestions on  this please.