}
    }

    public void setLimitNumber(final long limitNumber) {
        this.limitNumber = limitNumber;
    }

    protected void addDocumentToQueue() {
        if (docCount.get() > getLimitDocNum(totalDocNum, limitPercentage, limitNumber)) {
            isFinished.set(true);
            return;
        }

        RuntimeException exception = null;

        for (int i = 0; i < maxRetryCount; i++) {