ClusterListenerDistInitialStateTest emits NPE warning

Transport protocol stack used = tcp
10:34:56,431 ERROR (remote-thread-ClusterListenerDistInitialStateTest-NodeB-p10-t6) [RpcManagerImpl] ISPN000073: Unexpected error while replicating
java.lang.NullPointerException
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.sendTo(JGroupsTransport.java:724)
	at org.infinispan.remoting.rpc.RpcManagerImpl.sendTo(RpcManagerImpl.java:254)
	at org.infinispan.interceptors.TriangleAckInterceptor.sendExceptionAck(TriangleAckInterceptor.java:266)
	at org.infinispan.interceptors.TriangleAckInterceptor.onRemotePrimaryOwner(TriangleAckInterceptor.java:158)
	at org.infinispan.interceptors.InvocationFinallyAction.apply(InvocationFinallyAction.java:18)
	at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.addCallback(SimpleAsyncInvocationStage.java:67)
	at org.infinispan.interceptors.InvocationStage.andFinally(InvocationStage.java:39)
	at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:160)
	at org.infinispan.interceptors.TriangleAckInterceptor.handleWriteCommand(TriangleAckInterceptor.java:147)10:34:56,437 ERROR (remote-thread-ClusterListenerDistInitialStateTest-NodeB-p10-t6) [RpcManagerImpl] ISPN000073: Unexpected error while replicating
java.lang.NullPointerException
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.sendTo(JGroupsTransport.java:724)
	at org.infinispan.remoting.rpc.RpcManagerImpl.sendTo(RpcManagerImpl.java:254)
	at org.infinispan.interceptors.TriangleAckInterceptor.sendExceptionAck(TriangleAckInterceptor.java:266)
	at org.infinispan.interceptors.TriangleAckInterceptor.onRemotePrimaryOwner(TriangleAckInterceptor.java:158)
	at org.infinispan.interceptors.InvocationFinallyAction.apply(InvocationFinallyAction.java:18)
	at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.addCallback(SimpleAsyncInvocationStage.java:67)
	at org.infinispan.interceptors.InvocationStage.andFinally(InvocationStage.java:39)
	at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:160)
	at org.infinispan.interceptors.TriangleAckInterceptor.handleWriteCommand(TriangleAckInterceptor.java:147)10:35:12,455 ERROR (remote-thread-ClusterListenerDistInitialStateTest-NodeDH-p890-t6) [RpcManagerImpl] ISPN000073: Unexpected error while replicating
java.lang.NullPointerException
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.sendTo(JGroupsTransport.java:724)
	at org.infinispan.remoting.rpc.RpcManagerImpl.sendTo(RpcManagerImpl.java:254)
	at org.infinispan.interceptors.TriangleAckInterceptor.sendExceptionAck(TriangleAckInterceptor.java:266)
	at org.infinispan.interceptors.TriangleAckInterceptor.onRemotePrimaryOwner(TriangleAckInterceptor.java:158)
	at org.infinispan.interceptors.InvocationFinallyAction.apply(InvocationFinallyAction.java:18)
	at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.addCallback(SimpleAsyncInvocationStage.java:67)
	at org.infinispan.interceptors.InvocationStage.andFinally(InvocationStage.java:39)
	at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:160)
	at org.infinispan.interceptors.TriangleAckInterceptor.handleWriteCommand(TriangleAckInterceptor.java:147)10:35:12,456 ERROR (remote-thread-ClusterListenerDistInitialStateTest-NodeDH-p890-t6) [RpcManagerImpl] ISPN000073: Unexpected error while replicating
java.lang.NullPointerException
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.sendTo(JGroupsTransport.java:724)
	at org.infinispan.remoting.rpc.RpcManagerImpl.sendTo(RpcManagerImpl.java:254)
	at org.infinispan.interceptors.TriangleAckInterceptor.sendExceptionAck(TriangleAckInterceptor.java:266)
	at org.infinispan.interceptors.TriangleAckInterceptor.onRemotePrimaryOwner(TriangleAckInterceptor.java:158)
	at org.infinispan.interceptors.InvocationFinallyAction.apply(InvocationFinallyAction.java:18)
	at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.addCallback(SimpleAsyncInvocationStage.java:67)
	at org.infinispan.interceptors.InvocationStage.andFinally(InvocationStage.java:39)
	at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:160)
	at org.infinispan.interceptors.TriangleAckInterceptor.handleWriteCommand(TriangleAckInterceptor.java:147)