# Cannot retrieve cgroups information

**URL:** <https://discuss.elastic.co/t/cannot-retrieve-cgroups-information/141009>\
**Category:** Logstash\
**Created:** [July 21, 2018, 5:32pm UTC](https://discuss.elastic.co/t/cannot-retrieve-cgroups-information/141009 "2018-07-21T17:32:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wanzi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wanzi/32/33598_2.png) [@wanzi](https://discuss.elastic.co/u/wanzi)\
**Post date:** [July 21, 2018, 5:32pm UTC](https://discuss.elastic.co/t/cannot-retrieve-cgroups-information/141009/1 "2018-07-21T17:32:45Z")

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Hi all,

I got a problem from filebeat to logstash.  
The error message is as below:

[2018-07-21T13:27:39,692][DEBUG][logstash.instrument.periodicpoller.cgroup] Error, cannot retrieve cgroups information {:exception=\>"NoMethodError", :message=\>"undefined method `[]' for nil:NilClass"}

could someone help me to resolve it?

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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:** [August 18, 2018, 5:32pm UTC](https://discuss.elastic.co/t/cannot-retrieve-cgroups-information/141009/2 "2018-08-18T17:32:50Z")

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