# Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release **URL:** \ **Category:** Elasticsearch\ **Created:** [February 15, 2019, 6:38am UTC](https://discuss.elastic.co/t/java-hotspot-tm-64-bit-server-vm-warning-option-useconcmarksweepgc-was-deprecated-in-version-9-0-and-will-likely-be-removed-in-a-future-release/168527 "2019-02-15T06:38:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Nithin\_Sridhar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nithin_sridhar/32/73360_2.png) [@Nithin\_Sridhar](https://discuss.elastic.co/u/Nithin_Sridhar)\ **Post date:** [February 15, 2019, 6:38am UTC](https://discuss.elastic.co/t/java-hotspot-tm-64-bit-server-vm-warning-option-useconcmarksweepgc-was-deprecated-in-version-9-0-and-will-likely-be-removed-in-a-future-release/168527/1 "2019-02-15T06:38:47Z")
I'm using elasticsearch-6.6.0, Ubuntu 18.04 and Java verison as 10 details are below: java -version java version "10.0.2" 2018-07-17 Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode) I'm getting below error when I tired to run bin/elasticsearch: Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release. [2019-02-15T12:04:00,541][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [unknown] uncaught exception in thread [main] org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.6.0.jar:6.6.0] at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.6.0.jar:6.6.0] Caused by: java.lang.RuntimeException: can not run elasticsearch as root at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:103) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:170) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-6.6.0.jar:6.6.0] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-6.6.0.jar:6.6.0] ... 6 more Please help me to find best solution ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [February 15, 2019, 7:18am UTC](https://discuss.elastic.co/t/java-hotspot-tm-64-bit-server-vm-warning-option-useconcmarksweepgc-was-deprecated-in-version-9-0-and-will-likely-be-removed-in-a-future-release/168527/2 "2019-02-15T07:18:00Z")
Don't start elasticsearch as the root user. Please read carefully the installation guide. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 15, 2019, 7:18am UTC](https://discuss.elastic.co/t/java-hotspot-tm-64-bit-server-vm-warning-option-useconcmarksweepgc-was-deprecated-in-version-9-0-and-will-likely-be-removed-in-a-future-release/168527/3 "2019-03-15T07:18:07Z")
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