[quote="thebuleon29, post:3, topic:176893"]
I have no idea of where t find the log file

It's probably a good idea to work this out before you need it again. The log is the first place to look when things go wrong. By default Elasticsearch logs most things to `stdout`, and I think the default for the Docker image is to also log to `/usr/share/elasticsearch/logs` which you can bind-mount to somewhere persistent.