# Cluster block

**URL:** <https://discuss.elastic.co/t/cluster-block/190231>\
**Category:** Elasticsearch\
**Created:** [July 12, 2019, 12:15pm UTC](https://discuss.elastic.co/t/cluster-block/190231 "2019-07-12T12:15:24Z")\
**Posts on this page:** 1\
**Showing post:** 6

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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:** [July 12, 2019, 2:01pm UTC](https://discuss.elastic.co/t/cluster-block/190231/6 "2019-07-12T14:01:49Z")

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There are only two ways that this block can be applied: either manually via the API, or automatically if disk usage went above the `flood_stage` watermark. If it was due to disk usage then there will be evidence in your logs.

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_[View the full topic](https://discuss.elastic.co/t/cluster-block/190231)._