# How to debug statsd

**URL:** <https://discuss.elastic.co/t/how-to-debug-statsd/79467>\
**Category:** Logstash\
**Created:** [March 21, 2017, 4:21pm UTC](https://discuss.elastic.co/t/how-to-debug-statsd/79467 "2017-03-21T16:21:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ENG618](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eng618/32/59206_2.png) [@ENG618](https://discuss.elastic.co/u/ENG618)\
**Post date:** [March 21, 2017, 4:21pm UTC](https://discuss.elastic.co/t/how-to-debug-statsd/79467/1 "2017-03-21T16:21:33Z")

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I keep getting the following line in my output:

`Unable to parse line: "logstash.%{host}.spaces.GET./api/673283b4667df11448015951bc0450"`

I am trying to get additional information as to why the parser is failing. I've tried replacing the `/` with `.` and `_` but it is still failing...

**Questions**

1. So the main question that I was not able to find, is there a way to set a more informative debug statement? Or any other recomendations on tracking down this issue.

2. Is there a way to hardcode the output prefixes? **i.e.** I set the prefix to be `collectd-update` and it shows up in metrics as `collectd-update72bc3f60a0e0`

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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:** [April 18, 2017, 4:21pm UTC](https://discuss.elastic.co/t/how-to-debug-statsd/79467/2 "2017-04-18T16:21:42Z")

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Closed on April 18, 2017, 4:21pm UTC

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