I am executing a query using submitExecute(StatementCallback) under non-continuous mode. In the onRow() method of the callback, I execute ResultSet.isLast(). The query is against an execution whose next() method initially throws DataNotAvailable.NO_POLLING. Some time later, it calls ExecutionContext.dataAvailable(). After 255 rows reported through the callback's onRow(), ResultSet.isLast() hangs.

I know that the entire result set is ultimately returned from the execution's next() and it returns null at the last call.

See https://community.jboss.org/thread/205559?tstart=0 for more detail