# How to update \`discovery.zen.fd.timeout\` dynamically?

**URL:** <https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421>\
**Category:** Elasticsearch\
**Created:** [February 17, 2017, 1:07am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421 "2017-02-17T01:07:38Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![Brad\_Jungsu\_Heo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/brad_jungsu_heo/32/13135_2.png) [@Brad\_Jungsu\_Heo](https://discuss.elastic.co/u/Brad_Jungsu_Heo)\
**Post date:** [February 17, 2017, 1:07am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/1 "2017-02-17T01:07:38Z")

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Hello, I'm currently using ES 2.3.2

I wanted to update `discovery.zen.fd.timeout` dynamically like below:

```auto
PUT /_cluster/settings
{
    "persistent": {
        "discovery.zen.fd.timeout": "10s"
    }
}

```

But It doesn't work. The only way I can do is modifying `config/elasticsearch.yml` and Rolling Restart.

How can I change it dynamically so that I avoid Rolling Restart.

Thanks.

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 17, 2017, 1:31am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/2 "2017-02-17T01:31:44Z")

</div>

You can't, it's not a dynamic setting.

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<div class="post-metadata">

**Author:** ![Brad\_Jungsu\_Heo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/brad_jungsu_heo/32/13135_2.png) [@Brad\_Jungsu\_Heo](https://discuss.elastic.co/u/Brad_Jungsu_Heo)\
**Post date:** [February 17, 2017, 5:43am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/3 "2017-02-17T05:43:33Z")

</div>

Thank you for answering every time when I ask 😉

OK. But, I'm wondering why it is not a dynamic updatable configuration while `discovery.zen.minimum_master_nodes` can be changed dynimacally.

Could you please explain the reason? Thanks in advanced.

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 17, 2017, 6:10am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/4 "2017-02-17T06:10:53Z")

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I don't know sorry.

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<div class="post-metadata">

**Author:** ![Brad\_Jungsu\_Heo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/brad_jungsu_heo/32/13135_2.png) [@Brad\_Jungsu\_Heo](https://discuss.elastic.co/u/Brad_Jungsu_Heo)\
**Post date:** [February 17, 2017, 6:30am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/5 "2017-02-17T06:30:03Z")

</div>

OK! Thank you 😉

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [February 17, 2017, 6:40am UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/6 "2017-02-17T06:40:13Z")

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Can you try with 5.2.1 and if it is still not being updatable, open a feature request on GitHub?

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<div class="post-metadata">

**Author:** ![Brad\_Jungsu\_Heo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/brad_jungsu_heo/32/13135_2.png) [@Brad\_Jungsu\_Heo](https://discuss.elastic.co/u/Brad_Jungsu_Heo)\
**Post date:** [February 17, 2017, 12:23pm UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/7 "2017-02-17T12:23:29Z")

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Yes, It is not dynamically updatable.

I've opened a feature request: [https://github.com/elastic/elasticsearch/issues/23230](https://github.com/elastic/elasticsearch/issues/23230)

Thanks.

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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 17, 2017, 12:23pm UTC](https://discuss.elastic.co/t/how-to-update-discovery-zen-fd-timeout-dynamically/75421/8 "2017-03-17T12:23:46Z")

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