# java.lang.UnsupportedOperationException on starting elasticsearch

**URL:** <https://discuss.elastic.co/t/java-lang-unsupportedoperationexception-on-starting-elasticsearch/64548>\
**Category:** Elasticsearch\
**Created:** [November 1, 2016, 11:45am UTC](https://discuss.elastic.co/t/java-lang-unsupportedoperationexception-on-starting-elasticsearch/64548 "2016-11-01T11:45:40Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![cbuescher](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cbuescher/32/60402_2.png) [@cbuescher](https://discuss.elastic.co/u/cbuescher)\
**Post date:** [November 1, 2016, 12:19pm UTC](https://discuss.elastic.co/t/java-lang-unsupportedoperationexception-on-starting-elasticsearch/64548/2 "2016-11-01T12:19:18Z")

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This is just a warning, ES should start fine, just with a warning about seccomp not being available.

Elasticsearch security module tries to revoke Linux process privileges to reduce so called "attack vector" for malevolent activities, but your Linux kernel is either too old or not able to offer that process privilege revoke API.  
Here's the related issue: [https://github.com/elastic/elasticsearch/pull/13753](https://github.com/elastic/elasticsearch/pull/13753)

I think you can set `bootstrap.seccomp=false` in the yml file to disable this.

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