Getting ClassNotFoundException during marshalling StringBuilder on AIX/IBM JDK in EAP 6.1.1

Issue

• Getting ClassNotFoundException when sending instance of StringBuilder class from Windows/Oracle JDK (client) to AIX/IBM JDK (JBoss server) as follows:-

Exception in thread "main" javax.ejb.EJBException: java.lang.ClassNotFoundException: java.lang.AbstractStringBuilder
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:236)
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:181)
    at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:144)
    at com.sun.proxy.$Proxy0.sendStringBuilder(Unknown Source)
    at test.TestClient.main(TestClient.java:53)
Caused by: java.lang.ClassNotFoundException: java.lang.AbstractStringBuilder
    at java.lang.Class.forNameImpl(Native Method)
    at java.lang.Class.forName(Class.java:219)
    at org.jboss.marshalling.AbstractClassResolver.loadClass(AbstractClassResolver.java:135)
    at org.jboss.marshalling.AbstractClassResolver.resolveClass(AbstractClassResolver.java:116)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:925)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:960)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1259)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:213)
    at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:37)
    at org.jboss.as.ejb3.remote.protocol.versionone.MethodInvocationMessageHandler.processMessage(MethodInvocationMessageHandler.java:163)
    at org.jboss.as.ejb3.remote.protocol.versionone.VersionOneProtocolChannelReceiver.handleMessage(VersionOneProtocolChannelReceiver.java:157)
    at org.jboss.remoting3.remote.RemoteConnectionChannel$5.run(RemoteConnectionChannel.java:435)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:781)
    at ...asynchronous invocation...(Unknown Source)