# Unexpected behaviour for exec input plugin

**URL:** <https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664>\
**Category:** Logstash\
**Created:** [August 9, 2018, 9:37am UTC](https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664 "2018-08-09T09:37:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Marco\_Strambelli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marco_strambelli/32/32161_2.png) [@Marco\_Strambelli](https://discuss.elastic.co/u/Marco_Strambelli)\
**Post date:** [August 9, 2018, 9:37am UTC](https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664/1 "2018-08-09T09:37:26Z")

</div>

The _curl_ command returns empty message.

```
input {
  exec {
    command => "curl -s -I <url>"
    interval => 30
  }
}
```

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<div class="post-metadata">

**Author:** ![waqark3389](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/waqark3389/32/34265_2.png) [@waqark3389](https://discuss.elastic.co/u/waqark3389)\
**Post date:** [August 9, 2018, 10:27am UTC](https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664/2 "2018-08-09T10:27:55Z")

</div>

Works for me exactly as above, which version and can you post your whole config?

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<div class="post-metadata">

**Author:** ![Marco\_Strambelli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marco_strambelli/32/32161_2.png) [@Marco\_Strambelli](https://discuss.elastic.co/u/Marco_Strambelli)\
**Post date:** [August 13, 2018, 10:32am UTC](https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664/3 "2018-08-13T10:32:22Z")

</div>

- Plugin version: v3.3.1

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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:** [September 10, 2018, 10:32am UTC](https://discuss.elastic.co/t/unexpected-behaviour-for-exec-input-plugin/143664/4 "2018-09-10T10:32:31Z")

</div>

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