# WARNING: Default JAVA\_OPTS

**URL:** <https://discuss.elastic.co/t/warning-default-java-opts/41042>\
**Category:** Logstash\
**Created:** [February 5, 2016, 10:06am UTC](https://discuss.elastic.co/t/warning-default-java-opts/41042 "2016-02-05T10:06:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![carmelom](https://avatars.discourse-cdn.com/v4/letter/c/e19adc/32.png) [@carmelom](https://discuss.elastic.co/u/carmelom)\
**Post date:** [February 5, 2016, 10:06am UTC](https://discuss.elastic.co/t/warning-default-java-opts/41042/1 "2016-02-05T10:06:14Z")

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Hello,  
I am using logstash-2.2.0 version. I am trying to run logstash in a Linux machine but I got this error:

> WARNING: Default JAVA\_OPTS will be overridden by the JAVA\_OPTS defined in the environment. Environment JAVA\_OPTS are -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:+UseConcMarkSweepGC

I have this :

> echo $JAVA\_OPTS  
> -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:+UseConcMarkSweepGC

What should I do to fix this error ?

Regards  
Carmelo

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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:** [July 6, 2017, 5:12am UTC](https://discuss.elastic.co/t/warning-default-java-opts/41042/2 "2017-07-06T05:12:57Z")

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Closed on July 6, 2017, 5:12am UTC