# upgrade from 0.20.6 to 0.21  extension error...

**URL:** <https://discourse.sensu.io/t/upgrade-from-0-20-6-to-0-21-extension-error/508>\
**Category:** Sensu Classic (EOL)\
**Created:** [November 24, 2015, 12:44pm UTC](https://discourse.sensu.io/t/upgrade-from-0-20-6-to-0-21-extension-error/508 "2015-11-24T12:44:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Joao\_Carlos](https://avatars.discourse-cdn.com/v4/letter/j/9de0a6/32.png) [@Joao\_Carlos](https://discourse.sensu.io/u/Joao_Carlos)\
**Post date:** [November 24, 2015, 12:44pm UTC](https://discourse.sensu.io/t/upgrade-from-0-20-6-to-0-21-extension-error/508/1 "2015-11-24T12:44:04Z")

</div>

Hi,

I did upgrade to sensu version 0.21 and now I have a extension error…

_PS: I’m using influxdb.rb in /etc/sensu/extensions/ not in handlers_

This is the MESSAGE ERROR:

**{“timestamp”:“2015-11-24T11:21:10.248436+0000”,“level”:“error”,“message”:“unknown handler”,“handler\_name”:“influxdb”}**

**cat metric\_disk.json**

{

“checks”: {

“metric\_disk”: {

“type”: “metric”,

“command”: “/opt/sensu/embedded/bin/ruby /etc/sensu/plugins/metrics/metrics-disk.rb”,

“handlers”: [“influxdb”],

“subscribers”: [“all”],

“interval”: 60

}

}

}

tks

Joao