# 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:** \ **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:** 4\ **Page:** 1
**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, 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/248438/1 "2020-09-13T11:49:44Z")
Hi All, Greeting !! I am creating the new setup of ELK, and now i am unable to start ES service. Logs are below for reference. ES Version: 7.9 elasticsearch.yml config:- cluster.name: BPOConnectElasticSearch 2 node.name: "BPOConnectNode01" 3 node.master: true 4 node.data: true 5 node.local: true 6 index.number\_of\_shards: 1 7 #added 8 #index.number\_of\_replicas: 0 9 path.conf: /etc/elasticsearch/ 10 path.data: /opt/data1/ESData/Index 11 path.work: /opt/data1/ESData/work 12 path.logs: /opt/data1/ESData/logs 13 path.repo: /opt/ESRepo 14 bootstrap.mlockall: true 15 #changed 0.0.0.0 to ip local host 16 network.host: Local host IP i given 17 discovery.zen.minimum\_master\_nodes: 1 18 discovery.zen.ping.multicast.enabled: True 19 discovery.zen.ping.unicast.hosts: ["IP1, IP1"] ----\> removed ip for security purpose at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) [elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-7.9.1.jar:7.9.1] Suppressed: java.lang.IllegalArgumentException: unknown setting [discovery.zen.ping.multicast.enabled] please check that any required plugins are installed, or check the breaking changes documentation for removed settings at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:544) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:489) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:460) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:431) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:149) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:385) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:277) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) [elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) [elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-7.9.1.jar:7.9.1] [2020-09-13T13:28:42,797][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [BPOConnectNode01] uncaught exception in thread [main] org.elasticsearch.bootstrap.StartupException: java.lang.IllegalArgumentException: unknown setting [path.conf] please check that any required plugins are installed, or check the breaking changes documentation for removed settings at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:174) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.9.1.jar:7.9.1] Caused by: java.lang.IllegalArgumentException: unknown setting [path.conf] please check that any required plugins are installed, or check the breaking changes documentation for removed settings at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:544) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:489) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:460) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:431) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:149) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:385) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:277) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) ~[elasticsearch-7.9.1.jar:7.9.1] ... 6 more Suppressed: java.lang.IllegalArgumentException: unknown setting [bootstrap.mlockall] please check that any required plugins are installed, or check the breaking changes documentation for removed settings at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:544) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:489) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:460) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:431) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:149) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:385) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:277) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.9.1.jar:7.9.1] Suppressed: java.lang.IllegalArgumentException: unknown setting [path.work] please check that any required plugins are installed, or check the breaking changes documentation for removed settings at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:544) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:489) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:460) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.AbstractScopedSettings.validate(AbstractScopedSettings.java:431) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:149) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:385) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.node.Node.(Node.java:277) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:227) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) ~[elasticsearch-7.9.1.jar:7.9.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.9.1.jar:7.9.1] Suppressed: java.lang.IllegalArgumentException: unknown setting [discovery.zen.ping.multicast.enabled] please check that any required plugins are installed, or check the breaking changes documentation for removed s ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [September 13, 2020, 2:49pm 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/248438/2 "2020-09-13T14:49:48Z")
```nohighlight java.lang.IllegalArgumentException: unknown setting [path.conf] please check that any required plugins are installed, or check the breaking changes documentation for removed settings java.lang.IllegalArgumentException: unknown setting [bootstrap.mlockall] please check that any required plugins are installed, or check the breaking changes documentation for removed settings java.lang.IllegalArgumentException: unknown setting [path.work] please check that any required plugins are installed, or check the breaking changes documentation for removed settings java.lang.IllegalArgumentException: unknown setting [discovery.zen.ping.multicast.enabled] please check that any required plugins are installed, or check the breaking changes documentation for removed s ``` As it says, these settings are unknown. They used to exist in much older versions but they were all removed a long time ago. ---
**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")
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. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 11, 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/248438/4 "2020-10-11T14:53:50Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.