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We have Elasticsearch cluster of 3 nodes where 1 node is dedicated master and 2 nodes are dedicated data nodes. we have around 200GB of data on server and heavy _bulk and _search operations. The nodes configuration is

Master node :-
RAM - 8GB
Cores - 4

First Data node :-
RAM - 20GB
Cores - 8

Second Data node :-
RAM - 8GB
Cores - 4

We have 5 shards and 1 replica for all nodes.

We are getting socket hang up error very frequently for _bulk and _search both, we tried to make all nodes master eligible but it did not work.

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