# Elasticsearch TransportExceptions under load

**URL:** <https://discuss.elastic.co/t/elasticsearch-transportexceptions-under-load/80675>\
**Category:** Elasticsearch\
**Created:** [March 30, 2017, 12:28pm UTC](https://discuss.elastic.co/t/elasticsearch-transportexceptions-under-load/80675 "2017-03-30T12:28:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![abhijith\_reddy](https://avatars.discourse-cdn.com/v4/letter/a/977dab/32.png) [@abhijith\_reddy](https://discuss.elastic.co/u/abhijith_reddy)\
**Post date:** [March 30, 2017, 12:28pm UTC](https://discuss.elastic.co/t/elasticsearch-transportexceptions-under-load/80675/1 "2017-03-30T12:28:37Z")

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During the day when we have heavy search load I see a few TransportExceptions in the elasticsearch logs.

`Transport response handler not found of id [7060268778]`

We use libcurl to query elastisearch and this manifest's on the client side as

`Curl Error at items/_count?: Failure when receiving data from the peer (56)`

The search is simple filtering (no scoring) and getting counts. The CPU/Memory on all the nodes looks fine and don't see anything queueing on elasticsearch's end.  
I am also seeing lots of young gc collections while this is happening which could be related. I am trying to understand under what conditions the exception occurs and what does it mean ?

Using elasticsearch 2.4 version.

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<div class="post-metadata">

**Author:** ![abhijith\_reddy](https://avatars.discourse-cdn.com/v4/letter/a/977dab/32.png) [@abhijith\_reddy](https://discuss.elastic.co/u/abhijith_reddy)\
**Post date:** [March 31, 2017, 1:24pm UTC](https://discuss.elastic.co/t/elasticsearch-transportexceptions-under-load/80675/2 "2017-03-31T13:24:59Z")

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Bump.

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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:** [April 28, 2017, 1:25pm UTC](https://discuss.elastic.co/t/elasticsearch-transportexceptions-under-load/80675/3 "2017-04-28T13:25:24Z")

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Closed on April 28, 2017, 1:25pm UTC

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