ElasticSearch index exists not working / reliable

Question

I am writing a simple Java wrapper around ElasticSearch\'s admin client. To test it I have a main method that first checks if an index exists (IndicesExistsRequest), if so delet

Answer 1

I had the same issue but i didn't like the solution which uses an ActionListener. ElasticSearch also offers a Future variant (at least at version 6.1.0).

Here a code-snippet:

public boolean doesIndexExists(String indexName, TransportClient client) {
    IndicesExistsRequest request = new IndicesExistsRequest(indexName);
    ActionFuture future = client.admin().indices().exists(request);
    try {
        IndicesExistsResponse response = future.get();
        boolean result = response.isExists();
        logger.info("Existence of index '" + indexName + "' result is " + result);
        return result;
    } catch (InterruptedException | ExecutionException e) {
        logger.error("Exception at waiting for IndicesExistsResponse", e);
        return false;//do some clever exception handling
    }
}

May be this helps someone else too. Cheers!