# Full cluster restart upgrade : Stop indexing and perform a synced flush
**URL:** https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914
**Category:** Elasticsearch
**Created:** [April 15, 2019, 1:22pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914 "2019-04-15T13:22:53Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@ShilpaT](https://discuss.elastic.co/u/ShilpaT)
#### Post date: [April 15, 2019, 1:22pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914/1 "2019-04-15T13:22:53Z")
I am trying to do an update Elasticsearch from 5.6.3 to 7.0.0. I am referring to the following guide for it:
[https://www.elastic.co/guide/en/elasticsearch/reference/current/restart-upgrade.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/restart-upgrade.html)
The browser is throwing following error on step 2: **Stop indexing and perform a synced flush.**
{"message":"closed: [index\_closed\_exception] closed, with { index\_uuid="Q9-Fk8hdT5CqQyGUDKDtoA" & index=".kibana\_1" }","statusCode":400,"error":"Bad Request"}
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [April 15, 2019, 1:38pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914/2 "2019-04-15T13:38:51Z")
You can't upgrade from 5.x to 7.0 directly. Indices are not compatible and must be upgraded in 6.7.x first.
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### Author:  [@ShilpaT](https://discuss.elastic.co/u/ShilpaT)
#### Post date: [April 15, 2019, 1:39pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914/3 "2019-04-15T13:39:55Z")
My bad, I wrote '5.6.3' instead of '6.5.3'. The current version I'm using is 6.5.3
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [April 15, 2019, 2:05pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914/4 "2019-04-15T14:05:52Z")
You should upgrade to 6.7.x and use the upgrade assistant in Kibana to see what you need to fix if anything.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 13, 2019, 2:05pm UTC](https://discuss.elastic.co/t/full-cluster-restart-upgrade-stop-indexing-and-perform-a-synced-flush/176914/5 "2019-05-13T14:05:54Z")
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