# Elasticsearch timeouts and stop responding randomly

**URL:** <https://discuss.elastic.co/t/elasticsearch-timeouts-and-stop-responding-randomly/354386>\
**Category:** Elasticsearch\
**Created:** [February 28, 2024, 9:41pm UTC](https://discuss.elastic.co/t/elasticsearch-timeouts-and-stop-responding-randomly/354386 "2024-02-28T21:41:23Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![agonzalez](https://avatars.discourse-cdn.com/v4/letter/a/ba8739/32.png) [@agonzalez](https://discuss.elastic.co/u/agonzalez)\
**Post date:** [February 28, 2024, 9:41pm UTC](https://discuss.elastic.co/t/elasticsearch-timeouts-and-stop-responding-randomly/354386/1 "2024-02-28T21:41:23Z")

</div>

I have 4 .net services that use elasticsearch for indexing and querying documents.

From time to time .net services report timeout errors connecting to elasticsearch and during that time kibana also cant connect to elastic. If i check elastic cluster at those times they dont log any metric and looks like is not a problem with cpu or memory high consumption

 ![WhatsApp Image 2024-02-28 at 19.26.12_4e15a80d](https://us1.discourse-cdn.com/elastic/original/3X/a/6/a6a407d09a40e35499007df72a2bd6bcdb562e8e.jpeg)

when looking at the logs i see this warnings:

```auto

 {"@timestamp":"2024-02-28T12:23:34.583Z", "log.level": "WARN", "message":"block until refresh ran out of slots and forced a refresh: [BulkShardRequest [[admin_tasks-2024.02][0]] containing [index {[admin_tasks-2024.02][f79b5c13-7273-4f7a-b940-de39f7a63ef4], source[{\"startAt\":\"2024-02-28T12:23:20.3958202Z\",\"lastUpdateAt\":\"2024-02-28T12:23:20.3958202Z\",\"action\":31,\"status\":1,\"executionTimeout\":9223372036854775807,\"proxyConfigurationId\":\"ca930274-f400-47c1-866f-0a2be93534b7\",\"organizationId\":\"d51fec8b-8742-41ca-bf2a-a7657b863526\",\"id\":\"f79b5c13-7273-4f7a-b940-de39f7a63ef4\"}]}] blocking until refresh]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[elasticsearch-es-master-1][write][T#1]","log.logger":"org.elasticsearch.action.bulk.TransportShardBulkAction","trace.id":"8c00e06ad3844e0ab0338c97aa88a105","elasticsearch.cluster.uuid":"monZA5VJRTOM7JUtepfP9A","elasticsearch.node.id":"OHSa8hCNQ3uyL-ouWtwHpg","elasticsearch.node.name":"elasticsearch-es-master-1","elasticsearch.cluster.name":"elasticsearch"}
> {"@timestamp":"2024-02-28T14:19:56.627Z", "log.level": "WARN", "message":"block until refresh ran out of slots and forced a refresh: [BulkShardRequest [[admin_tasks-2024.02][0]] containing [index {[admin_tasks-2024.02][4c8f6d14-383f-4719-91c9-644cf4ce8572], source[{\"startAt\":\"2024-02-28T14:16:55.4137373Z\",\"lastUpdateAt\":\"2024-02-28T14:16:55.4137373Z\",\"action\":41,\"status\":2,\"resultMessage\":\"Total: 0\",\"executionTimeout\":0,\"agentUUID\":\"4C4C4544-0033-3710-8047-B4C04F375432\",\"organizationId\":\"85afb8b7-8f7a-400c-9fe4-48ebffe08172\",\"id\":\"4c8f6d14-383f-4719-91c9-644cf4ce8572\"}]}] blocking until refresh]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[elasticsearch-es-master-1][write][T#2]","log.logger":"org.elasticsearch.action.bulk.TransportShardBulkAction","trace.id":"3542621bd86dfd6f886f3bd43eab525e","elasticsearch.cluster.uuid":"monZA5VJRTOM7JUtepfP9A","elasticsearch.node.id":"OHSa8hCNQ3uyL-ouWtwHpg","elasticsearch.node.name":"elasticsearch-es-master-1","elasticsearch.cluster.name":"elasticsearch"}
> {"@timestamp":"2024-02-28T14:19:56.760Z", "log.level": "WARN", "message":"block until refresh ran out of slots and forced a refresh: [BulkShardRequest [[admin_tasks-2024.02][0]] containing [index {[admin_tasks-2024.02][81a3665a-aa95-43bf-8f1d-fe828d1d74e8], source[{\"startAt\":\"2024-02-28T14:16:57.3878789Z\",\"lastUpdateAt\":\"2024-02-28T14:16:57.3878789Z\",\"action\":41,\"status\":2,\"resultMessage\":\"Total: 0\",\"executionTimeout\":0,\"agentUUID\":\"DD595EFE-3234-4E8C-B4BF-CE96B0CB4227\",\"organizationId\":\"85afb8b7-8f7a-400c-9fe4-48ebffe08172\",\"id\":\"81a3665a-aa95-43bf-8f1d-fe828d1d74e8\"}]}] blocking until refresh]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[elasticsearch-es-master-1][write][T#1]","log.logger":"org.elasticsearch.action.bulk.TransportShardBulkAction","trace.id":"4c0b8a90b33eb0cc38dd483b14d026c7","elasticsearch.cluster.uuid":"monZA5VJRTOM7JUtepfP9A","elasticsearch.node.id":"OHSa8hCNQ3uyL-ouWtwHpg","elasticsearch.node.name":"elasticsearch-es-master-1","elasticsearch.cluster.name":"elasticsearch"}

```

any ideas what can cause elastic to stop responding? how can i find out what is causing this behaviour from time to time?

Stopping and restarting all my services seems to fix the issue for some time but after some time same problem.

---

<div class="post-metadata">

**Author:** ![jessgarson](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jessgarson/32/129841_2.png) [@jessgarson](https://discuss.elastic.co/u/jessgarson)\
**Post date:** [March 1, 2024, 12:06pm UTC](https://discuss.elastic.co/t/elasticsearch-timeouts-and-stop-responding-randomly/354386/2 "2024-03-01T12:06:49Z")

</div>

Thanks for reaching out here.

I have a few follow up questions:

- What version of Elastic are you using?
- How are you running Elastic?

Thanks!

Jessica

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 29, 2024, 12:07pm UTC](https://discuss.elastic.co/t/elasticsearch-timeouts-and-stop-responding-randomly/354386/3 "2024-03-29T12:07:24Z")

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