# Detect logstash output failure
**URL:** https://discuss.elastic.co/t/detect-logstash-output-failure/72725
**Category:** Logstash
**Created:** [January 25, 2017, 5:09am UTC](https://discuss.elastic.co/t/detect-logstash-output-failure/72725 "2017-01-25T05:09:39Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@rubpa](https://discuss.elastic.co/u/rubpa)
#### Post date: [January 25, 2017, 5:09am UTC](https://discuss.elastic.co/t/detect-logstash-output-failure/72725/1 "2017-01-25T05:09:39Z")
I realised that logstash does not log any error/warning if the output is gelf like below and the server a.b.c.d is down.
`gelf { host => "a.b.c.d" }`
The [code](https://github.com/logstash-plugins/logstash-output-gelf/blob/master/lib/logstash/outputs/gelf.rb#L194) seems to have a warning but I don't get any.
Any tips?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 22, 2017, 5:09am UTC](https://discuss.elastic.co/t/detect-logstash-output-failure/72725/2 "2017-02-22T05:09:40Z")
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