Elasticsearch crashes with - org.elasticsearch.cluster.block.ClusterBlockException

Elastic Stack Elasticsearch
21

No. I believe that's a safe value.

I don't know the Python client so I can't tell sorry.

22

Also how much RAM do you have on the machine?

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8GB RAM

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Is there any other process running on that machine? Anything else than Elasticsearch?

25

Other than Elasticsearch, flask application is running. To run flask in production, I am using gunicorn and Nginx. Thats it.

26

How much ram does it need to run?
You should not allocate more than half of the available ram to elasticsearch heap.

When a node is suddenly killed that could be caused by an OOM killer.

27

I didnt check how much flask is taking, but below is the part of memory info of my server.

MemTotal:        8135944 kB
MemFree:          359508 kB
MemAvailable:     488208 kB
Buffers:           19380 kB
Cached:           732836 kB
SwapCached:        26316 kB
Active:          6523720 kB

server has 8GB RAM so I gave 4gb for heap space.

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