NullPointerException in Infinispan ExternalizerTable in JBoss EAP 6.0.0

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Issue

Seeing the following error. Is it a bug?

766 WARN  [org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher] (Incoming-3,null) Problems unmarshalling remote command from byte buffer: java.lang.NullPointerException
    at org.infinispan.marshall.jboss.ExternalizerTable.readObject(ExternalizerTable.java:222)
    ...

Environment

JBoss Enterprise Application Platform (EAP)
- 6.0.0

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