From MarshallersTest:

java.io.IOException: Unknown magic number 0
at org.infinispan.marshall.MarshallerImpl.unmarshallObject(MarshallerImpl.java:545)
at org.infinispan.marshall.MarshallerImpl.unmarshallInternalCacheEntry(MarshallerImpl.java:581)
at org.infinispan.marshall.MarshallerImpl.unmarshallObject(MarshallerImpl.java:475)
at org.infinispan.marshall.MarshallerImpl.unmarshallBucket(MarshallerImpl.java:561)
at org.infinispan.marshall.MarshallerImpl.unmarshallObject(MarshallerImpl.java:505)
at org.infinispan.marshall.MarshallerImpl.unmarshallObject(MarshallerImpl.java:444)
at org.infinispan.marshall.MarshallerImpl.objectFromObjectStream(MarshallerImpl.java:964)
at org.infinispan.marshall.MarshallerImpl.objectFromByteBuffer(MarshallerImpl.java:982)
at org.infinispan.marshall.MarshallerImpl.objectFromByteBuffer(MarshallerImpl.java:986)
at org.infinispan.marshall.MarshallersTest.testBucketMarshalling(MarshallersTest.java:377)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:580)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:478)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:617)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:885)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:110)
at org.testng.TestRunner.runWorkers(TestRunner.java:712)
at org.testng.TestRunner.privateRun(TestRunner.java:582)
at org.testng.TestRunner.run(TestRunner.java:477)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:324)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:319)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:292)
at org.testng.SuiteRunner.run(SuiteRunner.java:198)
at org.testng.TestNG.createAndRunSuiteRunners(TestNG.java:823)
at org.testng.TestNG.runSuitesLocally(TestNG.java:790)
at org.testng.TestNG.run(TestNG.java:708)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:73)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:124)

Remember that MarshallersTest verifies number of bytes written with different marshallers and until now, it's been disabled due to JBMAR based marshaller having bigger payloads, but this could be changing soon