question: @ Override protected void doCommit ( ) throws TransactionException { final BigdataSailRepositoryConnection cxn = tlTx . get ( ) ; if ( cxn != null ) { try { cxn . commit ( ) ; } catch ( Exception ex ) { throw new TransactionException ( ex ) ; } finally { close ( cxn ) ; } } }
target:  Commit and close the unisolated connection (if open).