# Seeing Frequent NodeNotConnectedException errors

**URL:** <https://discuss.elastic.co/t/seeing-frequent-nodenotconnectedexception-errors/21542>\
**Category:** Elasticsearch\
**Created:** [January 8, 2015, 4:08pm UTC](https://discuss.elastic.co/t/seeing-frequent-nodenotconnectedexception-errors/21542 "2015-01-08T16:08:38Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![VincentBiret](https://avatars.discourse-cdn.com/v4/letter/v/54ee81/32.png) [@VincentBiret](https://discuss.elastic.co/u/VincentBiret)\
**Post date:** [September 30, 2015, 9:11am UTC](https://discuss.elastic.co/t/seeing-frequent-nodenotconnectedexception-errors/21542/4 "2015-09-30T09:11:26Z")

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Hello everyone,

Actually we had a lot of network issues between our nodes on AWS (nodes are on CentOS 7), looking into kernel messages I got several messages like :

```
xennet: skb rides the rocket: 19 slots
xennet: skb rides the rocket: 19 slots
xennet: skb rides the rocket: 19 slots

```

This bug is referred here :  
[https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1317811](https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1317811)

**Fix** : Disable scatter-gather on your network card

```
sudo ethtool -K eth0 sg off

```

Since, I don't have any other problem and our cluster is super healthy !

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