# Filebeat: Error on FD

**URL:** <https://discuss.elastic.co/t/filebeat-error-on-fd/173616>\
**Category:** Beats\
**Tags:** filebeat\
**Created:** [March 23, 2019, 8:55pm UTC](https://discuss.elastic.co/t/filebeat-error-on-fd/173616 "2019-03-23T20:55:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![chitraj8](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chitraj8/32/42639_2.png) [@chitraj8](https://discuss.elastic.co/u/chitraj8)\
**Post date:** [March 23, 2019, 8:55pm UTC](https://discuss.elastic.co/t/filebeat-error-on-fd/173616/1 "2019-03-23T20:55:49Z")

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We recently started using filebeat and its on latest version 6.6  
After initiating filebeat daemon process, we are able to push messages to kafka topics  
Also we started seeing some errors around the metric data in the logs  
ERROR instance/metrics\_file\_descriptors.go:39 Error while retrieving FD information: error getting number of open FD: key not found

Any idea what all things I should be considered to debug further?  
How to ensure such errors doesnt occur again in future?

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**Author:** ![kvch](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kvch/32/72058_2.png) [@kvch](https://discuss.elastic.co/u/kvch)\
**Post date:** [March 25, 2019, 10:29am UTC](https://discuss.elastic.co/t/filebeat-error-on-fd/173616/2 "2019-03-25T10:29:14Z")

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What OS are you running your Filebeat instance on?

It seems like Filebeat is not able to query the OS for FD information.

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<div class="post-metadata">

**Author:** ![chitraj8](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chitraj8/32/42639_2.png) [@chitraj8](https://discuss.elastic.co/u/chitraj8)\
**Post date:** [March 25, 2019, 11:12am UTC](https://discuss.elastic.co/t/filebeat-error-on-fd/173616/3 "2019-03-25T11:12:19Z")

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We are using rhel7 based linux system.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 22, 2019, 11:12am UTC](https://discuss.elastic.co/t/filebeat-error-on-fd/173616/4 "2019-04-22T11:12:20Z")

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