HotRod client try to unmarhall an object on get() no matter whether the put() use a byte[] or not ------------------------------------------------------------------------------------------------- Key: ISPN-5758 URL: https://issues.jboss.org/browse/ISPN-5758 Project: Infinispan Issue Type: Bug Components: Marshalling, Remote Protocols Affects Versions: 8.0.1.Final Reporter: Wolf-Dieter Fink Assignee: Galder Zamarreño Labels: hotrod, hotrod-java-client Fix For: 8.1.0.Alpha2, 8.1.0.Final Attachments: reproducer.zip If a client put an object as byte[] into the cache, which is a self serialized class, the get will return the original class (if it is in the class path) instead of the byte[]. This is incompatible to ISPN5 here the byte[] is returned in any case. It seems this in unintentional due to the smart 'compatibility' mode at client side https://github.com/infinispan/infinispan/blob/master/client/hotrod-client... The client should be able to get the same class type back