public void rollback(Throwable t){
  log.debug("  ROLLBACK: deleting " + tempFile + " due to "+ t);
  try {
    fileContentStore.delete(tempFile,node);
  }
 catch (  Exception e) {
    t.addSuppressed(e);
  }
}

public void rollback ( Throwable t ) { log . debug ( "  ROLLBACK: deleting " + tempFile + " due to " + t ) ; try { fileContentStore . delete ( tempFile , node ) ; } catch ( Exception e ) { t . addSuppressed ( e ) ; } }
rollback the download ( delete the temporary file )
