We are on ElasticSearch 2.4.4.
Suddenly elasticsearch start writing duplicate data and after checking the logs and data we found that another instance of elasticseach was started by Monit (https://mmonit.com/monit/) after a false detection.
Before that we have only one node directory "0" and now we are seeing another folder "1" and two different elastcisearch processes (ps aux). Both folders have identical data and all indexers operation are replicated on duplicate node as well hence doubled indexing time, disk consumption and processing.
I dont know what is it (a replica?) and how can I get rid of the duplicate one.