Cause an abnormal termination of the transaction.
The log is played backward, and any necessary undo operations are done. Before Transaction.abort returns, any locks held by the transaction will have been released.
In the case of nested transactions, aborting a parent transaction causes all children (unresolved or not) of the parent transaction to be aborted.
All cursors opened within the transaction must be closed before the transaction is aborted.
After Transaction.abort has been called, regardless of its return, the {@link com.sleepycat.db.Transaction Transaction} handle may not be accessed again.
@throws DatabaseException if a failure occurs.