# Resume indexing

**URL:** <https://discuss.elastic.co/t/resume-indexing/176886>\
**Category:** Elasticsearch\
**Created:** [April 15, 2019, 10:51am UTC](https://discuss.elastic.co/t/resume-indexing/176886 "2019-04-15T10:51:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Alessio\_Creo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alessio_creo/32/43381_2.png) [@Alessio\_Creo](https://discuss.elastic.co/u/Alessio_Creo)\
**Post date:** [April 15, 2019, 10:51am UTC](https://discuss.elastic.co/t/resume-indexing/176886/1 "2019-04-15T10:51:17Z")

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Hi there,

I'm going to "Rolling Upgrade" my ELK cluster. In the docs is written that I should operate

`POST _flush/synced`

to stop indexing. At the end the docs say that I have to resume indexing. Is there a specific API? Or is an automatic operation?

Thank you.

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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:** [April 15, 2019, 10:52am UTC](https://discuss.elastic.co/t/resume-indexing/176886/2 "2019-04-15T10:52:55Z")

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> [@Alessio\_Creo](#):
>
> I have to resume indexing. Is there a specific API? Or is an automatic operation?

No, this just means that you can start using Elasticsearch as normal again, i.e. you undo whatever you did in step 2:

> **2. Stop non-essential indexing ...**

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**Author:** ![Alessio\_Creo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alessio_creo/32/43381_2.png) [@Alessio\_Creo](https://discuss.elastic.co/u/Alessio_Creo)\
**Post date:** [April 15, 2019, 11:02am UTC](https://discuss.elastic.co/t/resume-indexing/176886/3 "2019-04-15T11:02:21Z")

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Thank you very much for the fast answer and for the explanation. All clear now.

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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:** [May 13, 2019, 11:02am UTC](https://discuss.elastic.co/t/resume-indexing/176886/4 "2019-05-13T11:02:36Z")

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