private void closeInternal(){
  final BigdataSailRepositoryConnection cxn=tlTx.get();
  if (cxn != null) {
    close(cxn);
  }
}

private void closeInternal ( ) { final BigdataSailRepositoryConnection cxn = tlTx . get ( ) ; if ( cxn != null ) { close ( cxn ) ; } }
release the unisolated connection .
