Getting jersey exception on wildfly9

Question

My application was initially working fine on Jboss5 and now I deployed it on Wildfly9 . And I am getting below exception:

    Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.sun.jersey.core.header.MediaTypes
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.sun.jersey.core.header.MediaTypes
    at com.sun.jersey.core.spi.factory.MessageBodyFactory.initReaders(MessageBodyFactory.java:182)
    at com.sun.jersey.core.spi.factory.MessageBodyFactory.initReaders(MessageBodyFactory.java:176)
    at com.sun.jersey.core.spi.factory.MessageBodyFactory.init(MessageBodyFactory.java:162)
    at com.sun.jersey.api.client.Client.init(Client.java:343)
    at com.sun.jersey.api.client.Client.access$000(Client.java:119)
    at com.sun.jersey.api.client.Client$1.f(Client.java:192)
    at com.sun.jersey.api.client.Client$1.f(Client.java:188)
    at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
    at com.sun.jersey.api.client.Client.<init>(Client.java:188)
    at com.sun.jersey.api.client.Client.<init>(Client.java:160)
    at com.sun.jersey.api.client.Client.create(Client.java:673)

Following jersey jars are already present in the lib but still I am getting this error. can anyone please help me with any pointer.

jersey-client-1.19.3.jar
jersey-core-1.19.3.jar

Answer 1

As point by @BalusC, you don't need to add jersey bundle as wildfly9 comes along with RestEASY , which is similar to Jersey an implementation of JAX-RS . So, you are mixing jersey and resteasy in same application.

If you look at the exception, it is trying to load class from jersey

Could not initialize class com.sun.jersey.core.header.MediaTypes

So, you need to change the implementation to load from RestEASY (if you have something similar there)