JBossMarshaller can throw NPE of externalizer table if trying to unmarshall while stopping cache

java.lang.AssertionError: Found an exception in at least 1 thread
	at org.testng.Assert.fail(Assert.java:83)
	at org.infinispan.streams.stress.DistributedStreamRehashStressTest.testStressNodesLeavingWhileMultipleIterators(DistributedStreamRehashStressTest.java:214)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:348)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:343)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:305)
	at org.testng.SuiteRunner.run(SuiteRunner.java:254)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
	at org.testng.TestNG.run(TestNG.java:1057)
	at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
	at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
	at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
	at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:125)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: org.infinispan.remoting.RemoteException: ISPN000217: Received exception from DistributedStreamRehashStressTest-NodeIY-53069, see cause for remote stack trace
	at org.infinispan.remoting.transport.AbstractTransport.checkResponse(AbstractTransport.java:44)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.checkRsp(JGroupsTransport.java:747)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.lambda$invokeRemotelyAsync$62(JGroupsTransport.java:586)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport$$Lambda$6/2001075041.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
	at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1954)
	at org.infinispan.remoting.transport.jgroups.SingleResponseFuture.futureDone(SingleResponseFuture.java:27)
	at org.jgroups.blocks.Request.checkCompletion(Request.java:169)
	at org.jgroups.blocks.UnicastRequest.receiveResponse(UnicastRequest.java:83)
	at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:398)
	at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:250)
	at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:675)
	at org.jgroups.JChannel.up(JChannel.java:739)
	at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1029)
	at org.jgroups.protocols.RSVP.up(RSVP.java:201)
	at org.jgroups.protocols.FRAG2.up(FRAG2.java:165)
	at org.jgroups.protocols.FlowControl.up(FlowControl.java:394)
	at org.jgroups.protocols.tom.TOA.up(TOA.java:121)
	at org.jgroups.protocols.pbcast.GMS.up(GMS.java:1042)
	at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
	at org.jgroups.protocols.UNICAST3.deliverMessage(UNICAST3.java:1064)
	at org.jgroups.protocols.UNICAST3.handleDataReceived(UNICAST3.java:779)
	at org.jgroups.protocols.UNICAST3.up(UNICAST3.java:426)
	at org.jgroups.protocols.pbcast.NAKACK2.up(NAKACK2.java:652)
	at org.jgroups.protocols.Discovery.up(Discovery.java:291)
	at org.jgroups.protocols.TP.passMessageUp(TP.java:1577)
	at org.jgroups.protocols.TP$MyHandler.run(TP.java:1796)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.infinispan.commons.CacheException: Problems invoking command.
	at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:159)
	at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:460)
	at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:377)
	... 20 more
Caused by: java.lang.NullPointerException
	at org.infinispan.marshall.core.JBossMarshaller$ExternalizerTableProxy.readObject(JBossMarshaller.java:153)
	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:354)
	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
	at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
	at org.infinispan.marshall.exts.ReplicableCommandExternalizer.readParameters(ReplicableCommandExternalizer.java:101)
	at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.readObject(CacheRpcCommandExternalizer.java:158)
	at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.readObject(CacheRpcCommandExternalizer.java:68)
	at org.infinispan.marshall.core.ExternalizerTable$ExternalizerAdapter.readObject(ExternalizerTable.java:436)
	at org.infinispan.marshall.core.ExternalizerTable.readObject(ExternalizerTable.java:227)
	at org.infinispan.marshall.core.JBossMarshaller$ExternalizerTableProxy.readObject(JBossMarshaller.java:153)
	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:354)
	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
	at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
	at org.infinispan.commons.marshall.jboss.AbstractJBossMarshaller.objectFromObjectStream(AbstractJBossMarshaller.java:134)
	at org.infinispan.marshall.core.VersionAwareMarshaller.objectFromByteBuffer(VersionAwareMarshaller.java:101)
	at org.infinispan.commons.marshall.AbstractDelegatingMarshaller.objectFromByteBuffer(AbstractDelegatingMarshaller.java:80)
	at org.infinispan.remoting.transport.jgroups.MarshallerAdapter.objectFromBuffer(MarshallerAdapter.java:28)
	at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:139)
	... 22 more
[testng-DistributedStreamRehashStressTest] Test testStressNodesLeavingWhileMultipleIterators(org.infinispan.streams.stress.DistributedStreamRehashStressTest) failed.