Exception on start up of application- java.lang.ClassCastException: org.jgroups.protocols.UDP cannot be cast to org.jgroups.stack.Protocol

[julian.prabhakar]

Hi,

I am trying to work with the JBoss AS 7 - Infinispan. My standalone.xml contains the following entry -

   <cache-container name="test" default-cache="cachedb" jndi-name="java:jboss/infinispan/test">

                <alias>

                    test

                </alias>

                <local-cache name="cachedb" batching="true"/>

    </cache-container>

I have no JGroups subsystem entry in my standalone.xml. Also, I am using jgroups-2.12.1.3 and infinispan-5.0.1 jars in my build path.

I have the following dependencies in my MANIFEST.MF file -

Dependencies: org.apache.log4j export, org.slf4j export, javax.jcr export, org.infinispan export.

I am not using any code like  -

@Resource(lookup="java:jboss/infinispan/jboss-as7-quickstart")

  private org.infinispan.manager.CacheContainer container ;   in my application.

On starting the server I get no exception, but when I try to start my application i get the error -

Caused by: org.infinispan.CacheException: Unable to invoke method public abstract void org.infinispan.remoting.transport.Transport.start() on object

    at org.infinispan.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:173) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.factories.AbstractComponentRegistry$PrioritizedMethod.invoke(AbstractComponentRegistry.java:890) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.factories.AbstractComponentRegistry.internalStart(AbstractComponentRegistry.java:683) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.factories.AbstractComponentRegistry.start(AbstractComponentRegistry.java:581) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.factories.GlobalComponentRegistry.start(GlobalComponentRegistry.java:176) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    ... 38 more

Caused by: java.lang.reflect.InvocationTargetException

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_13]

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_13]

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_13]

    at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_13]

    at org.infinispan.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:170) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    ... 42 more

Caused by: org.infinispan.CacheException: org.jgroups.ChannelException: unable to setup the protocol stack

    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.buildChannel(JGroupsTransport.java:292) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.initChannel(JGroupsTransport.java:227) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.initChannelAndRPCDispatcher(JGroupsTransport.java:255) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.start(JGroupsTransport.java:149) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    ... 47 more

Caused by: org.jgroups.ChannelException: unable to setup the protocol stack

    at org.jgroups.JChannel.init(JChannel.java:1728) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.JChannel.<init>(JChannel.java:249) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.JChannel.<init>(JChannel.java:215) [jgroups-2.12.1.3.Final.jar:]

    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.buildChannel(JGroupsTransport.java:289) [infinispan-core-5.0.1.FINAL.jar:5.0.1.FINAL]

    ... 50 more

Caused by: java.lang.ClassCastException: org.jgroups.protocols.UDP cannot be cast to org.jgroups.stack.Protocol

    at org.jgroups.stack.Configurator.createLayer(Configurator.java:433) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.stack.Configurator.createProtocols(Configurator.java:393) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:88) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:55) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.stack.ProtocolStack.setup(ProtocolStack.java:534) [jgroups-2.12.1.3.Final.jar:]

    at org.jgroups.JChannel.init(JChannel.java:1725) [jgroups-2.12.1.3.Final.jar:]

[julian.prabhakar]

Any respone woud truly be appreciated!

[ctomc]

Hi,

I would gues that you have infinispan and jgroups jars packed inside your application, try removing them (mark them as provided in pom.xml) and import them via dependancies in manifest.mf as server allready has them.

cheers,

tomaz

[nadirx]

Also, please upgrade to the latest AS7 (7.1.1) which includes Infinispan 5.1 and JGroups 3.0 and has many many improvements in the set up of the infinispan subsystem.

[dchuiko]

Hi,

I also got the exactly same error trying to update infinispan module in Jboss 7.2 from 5.2.1 to 5.3.0 This update leads to Jgroups module update. These new versions are connected together in modules using slots.

org.jgroups.stack.Configurator#createLayer method uses org.jgroups.util.Util#loadClass method which uses Thread.currentThread().getContextClassLoader() to load protocol class. In my case this classloader is my EAR classloader which doesn't know about any special Jgroups module version and takes class from default module which is different. After that in Configurator#createLayer(434) instantiated class casts to Protocol class. But these classes were loaded by different classloaders: one from module 3.3 and the other from main module what is why ClassCastException took place here.