I have an ELK database with the ElasticSearch logstash and Kibana each set up on a different docker container on the same host.

The problem I am having is that the ElasticSearch server stopped logging documents.

From what I was able to figure out, events are being sent to the logstash, but it seems they are not reaching ElasticSearch.

I tried setting the ElasticSearch server to be in a non read-only mode by setting:

"index.blocks.read_only_allow_delete": null

but it didn't seem to solve anything.

Does anyone have any idea what the problem could be?