Elasticsearch stopped due to (code = kill, signal = kill)

I use elasticsearch to store data from different IoT sensors and it was working good but elasticsearch stopped and when i check the log it show me like this can you please say which thing caused this error.

elasticsearch.service - Elasticsearch
Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)
Active: failed (Result: signal) since Thu 2020-10-01 01:07:23 CEST; 8h ago
Docs: https://www.elastic.co
Process: 4311 ExecStart=/usr/share/elasticsearch/bin/systemd-entrypoint -p ${PID_DIR}/elasticsearch.pid --quiet (code=killed, signal=KILL)
Main PID: 4311 (code=killed, signal=KILL)

thank you in advance for your reply

Can you check the actual Elasticsearch logs?