Hi, When using jboss 4.2.3 with our app, we got an error of this sort (from memory): Cannot Execute query.....Transaction status marked rollback | Caused by: jboss.util.NestedSQLException | at ...WrappedConnection.checkTransactionStatus | Scenario when the above error happens: a) User submits request from a web page b) A jta transaction is started in a filter c) From UI layer, transaction is propagated to service layer with "Propation Required" setting. d) Service layer throws an exception (validation) and transaction is marked for rollback. Note that it is marked for rollback and not rolledback e) The ui layer now prepares the view which requires some db queries to be executed. As soon as the first query is tried to be executed, the above exception is thrown. I tried the above same steps with jboss 4.2.1 and it works fine. On further probing, found that in jboss 4.2.3, there was a change made as part of: https://jira.jboss.org/jira/browse/JBAS-5080 https://jira.jboss.org/jira/browse/JBAS-5083 I believe that jca should discriminate between read only and update queries and should *allow* read only queries to go through when transaction is marked for rollback. These would allow the views to get generated in the same transaction. Ours is a 2-tier system (ui + service layer execute in the same jvm) and we are using Hibernate's recommended OpenSessionInViewPattern with one hib session+ one transaction per request. Else, we'll have to refactor our code to have one hib session + 2 transactions (one for service layer and the other for the view). Anyone has any thoughts about this? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4250785#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...