elasticsearch

Elasticsearch ordering by field value which is not in the filter

by

You would need a custom sort using script to achieve what you want. I’ve just made use of generic match_all query for my query, you can probably go ahead and add your query logic there, but the solution that you are looking for is in the sort section of the below query. Make sure that status is a keyword type Custom Sorting Based on Values … Read more

java.lang.IllegalStateException: Failed to introspect Class

by

Caused by: java.lang.ClassNotFoundException: org.springframework.data.elasticsearch.core.ElasticsearchOperations This error message means that the jar containing this class is not on the application classpath. Add spring-data-elasticsearch jar to it, and your error should be gone. if you are using maven, add the jar to the classpath this way : The version that you should use depends on the version … Read more

Elasticsearch vs Cassandra vs Elasticsearch with Cassandra

by

One of our applications uses data that is stored into both Cassandra and ElasticSearch. We use Cassandra to access those records whenever we can, and have data duplicated into query tables designed to adhere to specific application-side requests. For a more liberal search than our query tables can allow, ElasticSearch performs that functionality nicely. We … Read more

Elasticsearch: Max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

by

Vivek’s answer is correct, however, the setting will only last for the duration of the session. If the host reboots, the setting will be reset to the original value. If you want to set this permanently, you need to edit /etc/sysctl.conf and set vm.max_map_count to 262144. When the host reboots, you can verify that the setting is still correct … Read more

Solr vs. ElasticSearch

by

Update Now that the question scope has been corrected, I might add something in this regard as well: There are many comparisons between Apache Solr and ElasticSearch available, so I’ll reference those I found most useful myself, i.e. covering the most important aspects: Bob Yoplait already linked kimchy’s answer to ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage?, … Read more

Kibana server is not ready yet

by

I have just installed Kibana 7.3 on RHEL 8. The Kibana service is active (running).I receive Kibana server is not ready yet message when i curl to http://localhost:5601. My Elasticsearch instance is on another server and it is responding with succes to my requests. I have updated the kibana.yml with that elasticsearch.hosts:[“http://EXTERNAL-IP-ADDRESS-OF-ES:9200“] i can reach … Read more