I have done some small changed on XID on Journal. The Journal should be agnostic about XID IMO, The StorageManager should be the correct place to encode and decode that. So, I have changed it a little bit. journal.prepare is now receiving an EncodingSupport, and TransactionHolder is aways holding a byte[] representing the XID. JournalStorageManager later will translate that after load is done. I have also added a few more assertions around Journal tests to make sure the data is handled fine on prepareTransactions. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4174728#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...