# 0.90.2: Discovery BUG when network outage occurs?

**URL:** <https://discuss.elastic.co/t/0-90-2-discovery-bug-when-network-outage-occurs/13738>\
**Category:** Elasticsearch\
**Created:** [September 24, 2013, 2:53pm UTC](https://discuss.elastic.co/t/0-90-2-discovery-bug-when-network-outage-occurs/13738 "2013-09-24T14:53:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![amos\_wood](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/amos_wood/32/1880_2.png) [@amos\_wood](https://discuss.elastic.co/u/amos_wood)\
**Post date:** [September 24, 2013, 2:53pm UTC](https://discuss.elastic.co/t/0-90-2-discovery-bug-when-network-outage-occurs/13738/1 "2013-09-24T14:53:55Z")

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Background

Using ES for quite a while now, we have multiple situations where network  
outages have occurred which resulted in the data nodes not wanting to  
rejoin the cluster after the network outage was resolved. The only way to  
resolve this issue was to reboot the cluster (or maybe just the current  
master).

As I attempted to track this issue down to explain it, I have noticed that  
quite a few people have posted similar issues on this forum but no one was  
able to resolve it.

TESTING SCENARIO

I have a small cluster (2 master/data nodes) running 0.90.2 using unicast  
discovery.

_Steps to Reproduce_

1. From one of the nodes running on my local laptop, I connect to the  
cluster as a 3rd non-data node.
2. I pull the network plug out of the back of my laptop and wait until I  
start to get "transport.netty" exception which is ~45 seconds.
3. I then plug up the network again and wait until the initial  
connection is made again to the cluster to discover the master.
4. I then unplug the network again before the cluster state has been  
successfully updated from the master.
5. It then fails getting the master cluster state, but it doesn't  
continue trying to reconnect again. It will never attempt to reconnect  
again and you have to reboot the 3rd non-data node to reconnect.

_Log_

The log file for the 3rd non-data node is attached.

Conclusion

Since I can successfully reproduce this issue, is it a bug or that expected?

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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:** [July 6, 2017, 2:14am UTC](https://discuss.elastic.co/t/0-90-2-discovery-bug-when-network-outage-occurs/13738/2 "2017-07-06T02:14:53Z")

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