How can you change the tpc implementation? It's based on the standard from the OTS so we have no room for changing that, unless you mean that we should restrict distributed transactions from running in the client? We could (have in the past) always produce a thin-tx-client jar that knows only about the OTS.idl classes and how to manipulate that in the client abstractly, i.e., without having to have access to JBossTS implementation specific classes, but it could become a management nightmare. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200579#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...