# Inter-node communication protocol used in Elasticsearch?

**URL:** <https://discuss.elastic.co/t/inter-node-communication-protocol-used-in-elasticsearch/141656>\
**Category:** Elasticsearch\
**Created:** [July 25, 2018, 7:37pm UTC](https://discuss.elastic.co/t/inter-node-communication-protocol-used-in-elasticsearch/141656 "2018-07-25T19:37:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![abzter10690](https://avatars.discourse-cdn.com/v4/letter/a/a9adbd/32.png) [@abzter10690](https://discuss.elastic.co/u/abzter10690)\
**Post date:** [July 25, 2018, 7:37pm UTC](https://discuss.elastic.co/t/inter-node-communication-protocol-used-in-elasticsearch/141656/1 "2018-07-25T19:37:21Z")

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What is the application level (Layer 7) inter-node communication protocol used in Elasticsearch?  
Where can I get more info about that protocol?

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**Author:** ![Igor\_Motov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igor_motov/32/45193_2.png) [@Igor\_Motov](https://discuss.elastic.co/u/Igor_Motov)\
**Post date:** [July 25, 2018, 8:05pm UTC](https://discuss.elastic.co/t/inter-node-communication-protocol-used-in-elasticsearch/141656/2 "2018-07-25T20:05:24Z")

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It is an internal binary protocol that is implemented in java. It is not documented, so the only way to learn more about it is by studying the source code of Elasticsearch.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 22, 2018, 8:05pm UTC](https://discuss.elastic.co/t/inter-node-communication-protocol-used-in-elasticsearch/141656/3 "2018-08-22T20:05:28Z")

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