# Issue post upgrade from version 0.90.5 to 0.9.10

**URL:** <https://discuss.elastic.co/t/issue-post-upgrade-from-version-0-90-5-to-0-9-10/15606>\
**Category:** Elasticsearch\
**Created:** [February 4, 2014, 11:53pm UTC](https://discuss.elastic.co/t/issue-post-upgrade-from-version-0-90-5-to-0-9-10/15606 "2014-02-04T23:53:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![venku123](https://avatars.discourse-cdn.com/v4/letter/v/439d5e/32.png) [@venku123](https://discuss.elastic.co/u/venku123)\
**Post date:** [February 4, 2014, 11:53pm UTC](https://discuss.elastic.co/t/issue-post-upgrade-from-version-0-90-5-to-0-9-10/15606/1 "2014-02-04T23:53:31Z")

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We are planning on upgrade from 0.90.5 to 0.90.10 in our live environment.  
Prior to that we want to do the same in the test environment. Please find  
below the environment, upgrade steps and post upgrade issue detail

Environment:

- Master Only (no data node) - 3
- data only nodes - 3
- version 0.90.5

Upgrade step

```
  Not planning to have any down time and so followed the under 

```

mentioned steps while having the cluster up and running

- upgraded the data nodes to 0.90.10 one by one
- upgraded the eligible master nodes to 0.90.10 one by one
- upgraded the master node to 0.90.10

The upgrade was successful without any impact to the application.

Post upgrade, the following issue keeps occurring

On accessing the plugin head url, there will be no data beyond the cluster  
overview section (no index, nodes, shard details). But if you access the  
browser tab, the index does exist. Also I see the following error

[2014-02-04 22:40:15,518][DEBUG][action.admin.cluster.node.info]  
[[ppmn-elastic01-21947.phx-os1.stratus.dev.ebay.com](http://ppmn-elastic01-21947.phx-os1.stratus.dev.ebay.com)] failed to execute on  
node [ict1HABCQC-wGK3VvIHhXA]  
org.elasticsearch.transport.NodeDisconnectedException:  
[[es-upgrade-0.90.10-3-163533.phx-os1.stratus.dev.ebay.com](http://es-upgrade-0.90.10-3-163533.phx-os1.stratus.dev.ebay.com)][inet[/10.9.218.139:9300]][cluster/nodes/info/n]  
disconnected.

On restarting the data node with this issue, the cluster will come back  
normally. But after a while the same issue happens.

Any pointers?

Thanks  
Venkatesh

Connectes-upgrade-0.90.10-161885.phx-os1.stratus.dev.ebay.comcluster  
health: green (6, 1)ElasticSearch  
Info  
Overview  
Browser  
Structured Query [+]  
Any Request [+]  
Cluster Overview  
New Index  
Sort Cluster  
Refresh

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---

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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:** [July 6, 2017, 1:52am UTC](https://discuss.elastic.co/t/issue-post-upgrade-from-version-0-90-5-to-0-9-10/15606/2 "2017-07-06T01:52:37Z")

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Closed on July 6, 2017, 1:52am UTC