I have Elasticsearch installed as Windows Service. I noticed several times during last several days that Elasticsearch log files took whole free disk space. It seems to me it happens every several hours. I do not have big indexes at all, but have Kibana and Logstash on the same PC. I'm just creating simple index templates, delete them, create/delete index based on the template, index several lines from CSV file, run some queries with different analyzers, etc. File names are elasticsearch-service-x64-stdout.2016-09-19.log and elasticsearch.log located in elasticsearch\logs folder. The size of every file is about 16Gb right now. I just stop that Windows Service and remove log files. Otherwise they will take all free disk space. What can cause such grow of log files and how to prevent them from growing? Thanks.