public boolean stop() {
        if (!this.isStarted.get() || !this.isStopped.compareAndSet(false, true)) {
            return false;
        }
        this.timer.shutdown();
        LogWatchStorageSweeper.LOGGER.info("Cancelled automated unreachable message sweep in {}.",
                this.messaging.getLogWatch());
        return true;
    }
public boolean stop ( ) { if ( ! this . isStarted . get ( ) || ! this . isStopped . compareAndSet ( false , true ) ) { return false ; } this . timer . shutdown ( ) ; LogWatchStorageSweeper . LOGGER . info ( "Cancelled automated unreachable message sweep in {}." , this . messaging . getLogWatch ( ) ) ; return true ; }
Stop the sweeping if not stopped already.

@return False if {@link #start()} not called or {@link #stop()} called
already.