Can't Connect to Elasticsearch (through Curl)

Question

I\'ve recently installed Elasticsearch and everything was working well for the first few days, but somehow today it stopped working

When I start the service, it claims t

Answer 1

1) Check what's the status of your port 9200, with lsof command in linux.

In my case following is the result when elasticsearch is started.

prayag@prayag:~$ sudo lsof -i TCP | grep 9200 
chrome  2639 praayg   84u  IPv4 116310      0t0  TCP prayag.local:58989->10.0.4.70:9200 (ESTABLISHED)
chrome  2639 prayag   99u  IPv4 116313      0t0  TCP prayag.local:58990->10.0.4.70:9200 (ESTABLISHED)
java    7634 prayag  141u  IPv6 130960      0t0  TCP *:9200 (LISTEN)

elasticsearch is not a service to me, otherwise to find the port es is running; on I could have checked,

$ sudo lsof -iTCP -sTCP:LISTEN | grep elasticsearch

2) check the elasticsearch endpoint

$ curl -IGET http://localhost:9200
HTTP/1.1 200 OK
content-type: application/json; charset=UTF-8
content-length: 327

• -IGET is equivalent to --head that returns http response headers only.

• response 200 means elasticsearch endpoint is responding properly.