I am using ElasticSearch6.2.1. I am using single node cluster. It is working fine with my small size indices and medium traffic. But when I test for large number of concurrent request to handle using Apache JMeter, ES is going down with error message like below.

[![enter image description here](https://i.stack.imgur.com/Ly9xU.jpg)](https://i.stack.imgur.com/Ly9xU.jpg)

My requirement is to prevent ES to not crash even in such high traffic situation. It should discard requests after a certain time but not to stop working. Is there any option by which I can achieve it? Please advise.