The rollback-only state should put a transaction in a mode where only a commit is prohibited, but all the other functionality should work normally. So calling getAutoCommit should simply return true or false, and not throw an exception. Similarly checkTransactionActive should return true; there still is an active transaction, it only is not allowed to commit.

Caused by: java.sql.SQLException: IJ031070: Transaction cannot proceed: STATUS_MARKED_ROLLBACK
at org.jboss.jca.adapters.jdbc.WrapperDataSource.checkTransactionActive(WrapperDataSource.java:272)
at org.jboss.jca.adapters.jdbc.WrappedConnection.checkTransactionActive(WrappedConnection.java:2005)
at org.jboss.jca.adapters.jdbc.WrappedConnection.checkStatus(WrappedConnection.java:2020)
at org.jboss.jca.adapters.jdbc.WrappedConnection.getAutoCommit(WrappedConnection.java:869)
at com.avaje.ebeaninternal.server.transaction.JdbcTransaction.checkAutoCommit(JdbcTransaction.java:182)
at com.avaje.ebeaninternal.server.transaction.JdbcTransaction.<init>(JdbcTransaction.java:170)
... 67 more

Still being able to select in a rollback-only transaction is important to handle the reason why it was put in that state; maybe additional data is needed to add detail to any error message.