Serial marshaller dies when consective Externalizable objects are read

java.io.EOFException
at org.jboss.marshalling.serial.BlockUnmarshaller.readUnsignedByte(BlockUnmarshaller.java:248)
at org.jboss.marshalling.serial.BlockUnmarshaller.readInt(BlockUnmarshaller.java:283)
at org.jboss.test.marshalling.SimpleMarshallerTests$TestExternalizableWithSerializableFields.readExternal(SimpleMarshallerTests.java:1343)
at org.jboss.marshalling.serial.SerialUnmarshaller.doReadObject(SerialUnmarshaller.java:273)
at org.jboss.marshalling.serial.BlockUnmarshaller.readToEndBlockData(BlockUnmarshaller.java:107)
at org.jboss.marshalling.serial.SerialUnmarshaller.doReadObject(SerialUnmarshaller.java:274)
at org.jboss.marshalling.serial.SerialUnmarshaller.doReadObject(SerialUnmarshaller.java:79)
at org.jboss.marshalling.AbstractUnmarshaller.readObject(AbstractUnmarshaller.java:84)
at org.jboss.test.marshalling.SimpleMarshallerTests$41.runRead(SimpleMarshallerTests.java:1378)
at org.jboss.test.marshalling.TestBase.runReadWriteTest(TestBase.java:120)
at org.jboss.test.marshalling.SimpleMarshallerTests.testExternalizableWithFollowingObjects(SimpleMarshallerTests.java:1360)