# java.lang.IllegalArgumentException: unknown setting \[path.conf\] please check that any required plugins are installed, or check the breaking changes documentation for removed settings

**URL:** <https://discuss.elastic.co/t/java-lang-illegalargumentexception-unknown-setting-path-conf-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/248438>\
**Category:** Elasticsearch\
**Created:** [September 13, 2020, 11:49am UTC](https://discuss.elastic.co/t/java-lang-illegalargumentexception-unknown-setting-path-conf-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/248438 "2020-09-13T11:49:44Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![muthug](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/muthug/32/82555_2.png) [@muthug](https://discuss.elastic.co/u/muthug)\
**Post date:** [September 13, 2020, 2:53pm UTC](https://discuss.elastic.co/t/java-lang-illegalargumentexception-unknown-setting-path-conf-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/248438/3 "2020-09-13T14:53:49Z")

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Hi David,

Thanks for your reply, Yes i found the same and i freshly installed on RHEL 7 and got struck on the mentioned issue. Could you pls help on that

> [@java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native](https://discuss.elastic.co/t/java-lang-noclassdeffounderror-could-not-initialize-class-com-sun-jna-native/248441/10):
>
> Then I am out of ideas. Let's see if anyone else have come across this.

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