ProxiedResource Unable to call http

HI !

After upgrade to graylog 2.5 version i get sometimes messages like this in log:
2019-02-14T13:07:25.835+06:00 WARN [ProxiedResource] Unable to call on node <0c9a1464-c6ee-4506-8de2-55e326ecd389> timeout

And graylog dont write messages to elasticsearch. Restart help. But it bad workaround, i think.

Additional information:

sysadmin@graylog:~$ curl -I ''
HTTP/1.1 401 Unauthorized
WWW-Authenticate: Basic realm="Graylog Server"
X-Graylog-Node-ID: 0c9a1464-c6ee-4506-8de2-55e326ecd389
X-Runtime-Microseconds: 1561
Content-Length: 0
Date: Thu, 14 Feb 2019 10:48:46 GMT

sysadmin@graylog:~$ curl -I ''
HTTP/1.1 200 OK
X-Graylog-Node-ID: 0c9a1464-c6ee-4506-8de2-55e326ecd389
X-Runtime-Microseconds: 2323
Content-Length: 253
Content-Type: application/json
Date: Thu, 14 Feb 2019 10:48:51 GMT

rest_listen_uri =
web_listen_uri =
web_endpoint_uri =

UPD: up graylog memory from 4 to 8 Gb, it doesn’t help.

Today one of programmers do search query to index on elastic warm node and graylog stuck with api unavailable.

UPD: Problem is in requests to warm node of elasticsearch, heavy requests make graylog unusable for a some time. Is it possible to limit the queries or the output of information in the configuration of graylog ?

Did you use any plugins?

Did you read the Upgrade guide?

Did you use any plugins? No
Did you read the Upgrade guide? Yes

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