}

    /**
     * Creates and returns a new instance of {@link ArrayBlockingQueue}.
     *
     * @param <E> the element type of {@link ArrayBlockingQueue}
     * @param capacity the queue capacity
     * @param fair whether the queue is fair
     * @return a new instance of {@link ArrayBlockingQueue}
     * @see ArrayBlockingQueue#ArrayBlockingQueue(int, boolean)
     */

# Number of primary shards for crawler queue index.
index.document.crawler.queue.number_of_shards=10
# Number of primary shards for crawler data index.
index.document.crawler.data.number_of_shards=10
# Number of primary shards for crawler filter index.
index.document.crawler.filter.number_of_shards=10
# Number of replicas for crawler queue index.
index.document.crawler.queue.number_of_replicas=1