# Ulimit issue in elasticsearch

**URL:** <https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576>\
**Category:** Elasticsearch\
**Created:** [August 2, 2017, 4:11pm UTC](https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576 "2017-08-02T16:11:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![aliyesami](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@aliyesami](https://discuss.elastic.co/u/aliyesami)\
**Post date:** [August 2, 2017, 4:11pm UTC](https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576/1 "2017-08-02T16:11:16Z")

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moderators : I am pretty sure I created this post but i cant see it in my list of questions so please delete the other one if its visible to you.

I downloaded and untarred the elasticsearch-5.5.1 into a directory, created a user elasticsearch and made it the owner of the directory . i also set the "ulimit -n 65536" in the .bashrc and also placed the line "elasticsearch - nofile 65536" in "/etc/security/limits.conf" .  
I can see the "open files" set to 65536 but yet when i start elasticsearch its complaining about the max number of threads low ?

> uid=615(elasticsearch) gid=610(elasticsearch) groups=610(elasticsearch),501(hadoop)  
> [elasticsearch@hadoop1 logs]$  
> [elasticsearch@hadoop1 logs]$ ulimit -a | grep files  
> open files (-n) 65536  
> [elasticsearch@hadoop1 logs]$

> [2017-08-02T11:48:05,058][WARN][o.e.b.BootstrapChecks] [GYOaxnx] max number of threads [1024] for user [elasticsearch] is too low, increase to at least [2048]

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**Author:** ![Julien](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/julien/32/19688_2.png) [@Julien](https://discuss.elastic.co/u/Julien)\
**Post date:** [August 2, 2017, 6:00pm UTC](https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576/2 "2017-08-02T18:00:56Z")

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Can you try this :  
[https://www.elastic.co/guide/en/elasticsearch/reference/master/max-number-of-threads.html](https://www.elastic.co/guide/en/elasticsearch/reference/master/max-number-of-threads.html)

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**Author:** ![aliyesami](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@aliyesami](https://discuss.elastic.co/u/aliyesami)\
**Post date:** [August 3, 2017, 1:23am UTC](https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576/3 "2017-08-03T01:23:47Z")

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hi Julien  
I had already tried ulimit it didn't work , what worked ultimately is setting values for both nproc and nofiles in /etc/security/limits.conf

this issue is fixed for me .  
thanks

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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 31, 2017, 1:23am UTC](https://discuss.elastic.co/t/ulimit-issue-in-elasticsearch/95576/4 "2017-08-31T01:23:54Z")

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