# Put mapping hanged on cluster and cluster is non-responsive

**URL:** <https://discuss.elastic.co/t/put-mapping-hanged-on-cluster-and-cluster-is-non-responsive/174479>\
**Category:** Elasticsearch\
**Created:** [March 29, 2019, 6:42am UTC](https://discuss.elastic.co/t/put-mapping-hanged-on-cluster-and-cluster-is-non-responsive/174479 "2019-03-29T06:42:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Hitesh\_Chavhan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/hitesh_chavhan/32/43058_2.png) [@Hitesh\_Chavhan](https://discuss.elastic.co/u/Hitesh_Chavhan)\
**Post date:** [March 29, 2019, 6:42am UTC](https://discuss.elastic.co/t/put-mapping-hanged-on-cluster-and-cluster-is-non-responsive/174479/1 "2019-03-29T06:42:04Z")

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We are using Elasticsearch 5.6 and Java8.  
We have updated the cluster with put mapping and few hours later the cluster stopped responding.  
Only \_cat/pending\_tasks responding.  
Somehow we can see multiple put-mapping events, and even if we kill it , process re-occurs again with different taskId.  
All the data nodes are running with full utilization i.e 100% core utilized and there is not traffic on cluster.

Can anyone point to issue.  
Found multiple cases but not solutions.

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**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [March 29, 2019, 8:37am UTC](https://discuss.elastic.co/t/put-mapping-hanged-on-cluster-and-cluster-is-non-responsive/174479/2 "2019-03-29T08:37:43Z")

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I would look to the [nodes hot threads API](https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-nodes-hot-threads.html) to find out what the nodes are all doing. If this API is not responsive then you can use `jstack` on each node to grab the same information.

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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 26, 2019, 8:37am UTC](https://discuss.elastic.co/t/put-mapping-hanged-on-cluster-and-cluster-is-non-responsive/174479/3 "2019-04-26T08:37:52Z")

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Closed on April 26, 2019, 8:37am UTC

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