CODEWITHSUNDEEP
jaxbwebsphereclasscastexceptionwebsphere-liberty
tazzer
tazzer

Reputation: 21

WebSphere Liberty profile JAXBContext ClassCastException

I am using the WebSphere Liberty Profile server, version 8.5.5.3. I have an ear containing multiple wars. I deploy them all exploded (ear and the war's of the modules inside it as well).

When deploying it I get the following class cast exception:

java.lang.RuntimeException: javax.xml.bind.JAXBException: 
ClassCastException: attempting to cast bundleresource://67.fwk-1166858817/javax/xml/bind/JAXBContext.class 
to jar:file:/C:/ws/IBM/java_1.7_64/jre/lib/rt.jar!/javax/xml/bind/JAXBContext.class.
Please make sure that you are specifying the proper ClassLoader.

I figured that the problem is that my bundled jax-api and jaxb-impl jars are not loaded, so I added to the server.xml the parentLast class loading option:

<enterpriseApplication id="ear-app" location="C:/ws/ear/exploded/ear-app.ear" name="ear-app" >
    <classloader delegation="parentLast" commonLibraryRef="provided-jars" privateLibraryRef="shared-libs"/>
</enterpriseApplication>

I added my jax-api and jax-impl jars to this folder

<library id="shared-libs">
    <fileset dir="${server.config.dir}/lib/global" include="*.jar"/>
</library>

However I still have the ClassCastException, it looks like it is still using the parentFirst classloading?

I found other jaxb ClassCastException threads, but not when using the Liberty profile..

Upvotes: 1

Views: 2278

Answers (2)

tazzer
tazzer

Reputation: 21

I worked aroud the problem by not using the parentLast. Thanks for the help.

Upvotes: 0

Gas
Gas

Reputation: 18030

Maybe it is a typo, but in your post you have delegation="parentFirst" instead of parentLast.

Did you check to just change delegation for application like this:

<enterpriseApplication id="ear-app" location="C:/ws/ear/exploded/ear-app.ear" name="ear-app" >
    <classloader delegation="parentLast"/>
</enterpriseApplication>

For more details see Overriding a provided API with an alternative version

Upvotes: 1

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