What a happen? Please help me

i can't use elasticsearch
check service elasticsearch and kibana status active
{"error":{"root_cause":[{"type":"circuit_breaking_exception","reason":"[parent] Data too large, data for [<http_request>] would be [2985537059/2.7gb], which is larger than the limit of [2982071500/2.7gb], usages [request=0/0b, fielddata=0/0b, in_flight_requests=0/0b, accounting=2985537059/2.7gb]","bytes_wanted":2985537059,"bytes_limit":2982071500}],"type":"circuit_breaking_exception","reason":"[parent] Data too large, data for [<http_request>] would be [2985537059/2.7gb], which is larger than the limit of [2982071500/2.7gb], usages [request=0/0b, fielddata=0/0b, in_flight_requests=0/0b, accounting=2985537059/2.7gb]","byt

Welcome!

I moved your question to #elasticsearch as your problem is related to it.

It looks like here that one request is too large for the allocated memory on your nodes.
Hard to say more for now but may be you have not enough memory vs the number of documents, shards, indices.... ?

What is the output of:

GET /
GET /_cat/nodes?v
GET /_cat/health?v
GET /_cat/indices?v

If some outputs are too big, please share them on gist.github.com and link them here.

I can't use the kibana website and use commands check.
Can I add memory to solve the problem?

So run the same commands from the command line with curl.

root@elkap01:~# curl GET http://localhost:9200/_cat/nodes?v
curl: (6) Could not resolve host: GET
{"error":{"root_cause":[{"type":"circuit_breaking_exception","reason":"[parent] Data too large, data for [<http_request>] would be [2985614939/2.7gb], which is larger than the limit of [2556061286/2.3gb], usages [request=0/0b, fielddata=0/0b, in_flight_requests=0/0b, accounting=2985614939/2.7gb]","bytes_wanted":2985614939,"bytes_limit":2556061286}],"type":"circuit_breaking_exception","reason":"[parent] Data too large, data for [<http_request>] would be [2985614939/2.7gb], which is larger than the limit of [2556061286/2.3gb], usages [request=0/0b, fielddata=0/0b, in_flight_requests=0/0b, accounting=2985614939/2.7gb]","byt

Thank You for reply
I solved by adjusting up jvm.option

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