ClassCastException: com.redhat.marshaller.SomeSessionData cannot be cast to java.lang.String in JBoss EAP 6.3

Issue

• JBoss Marshalling fails to unmarshall object with empty array in JBoss EAP 6.3.0 with this exception:

Caused by: java.lang.ClassCastException: com.redhat.marshaller.SomeSessionData cannot be cast to java.lang.String
    at org.jboss.marshalling.ModularClassResolver.resolveClass(ModularClassResolver.java:95)
    at org.jboss.as.clustering.ClassLoaderAwareClassResolver.resolveClass(ClassLoaderAwareClassResolver.java:92)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:943)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:310)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
    at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712)
    at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1628)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
    at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712)
    at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1628)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadMapObject(RiverUnmarshaller.java:195)
    at org.jboss.marshalling.river.RiverUnmarshaller.readMapData(RiverUnmarshaller.java:819)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:682)
    at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
    at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
    at org.jboss.as.clustering.SimpleMarshalledValue.get(SimpleMarshalledValue.java:122)
    at org.jboss.as.clustering.web.impl.SessionAttributeMarshallerImpl.unmarshal(SessionAttributeMarshallerImpl.java:72)
    at org.jboss.as.clustering.web.infinispan.CoarseSessionAttributeStorage.load(CoarseSessionAttributeStorage.java:64)
    at org.jboss.as.clustering.web.infinispan.DistributedCacheManager$2.invoke(DistributedCacheManager.java:227)
    ... 41 more
Caused by: an exception which occurred:
    in field someObjectsArray
    in object of type com.redhat.marshaller.SomeSessionData
    in field instance
    in object of type org.jboss.weld.context.SerializableContextualInstanceImpl
    in map value at index [1] of size [3]