[2019-06-26T15:39:19,297][INFO ][o.e.e.NodeEnvironment ] [elasticmaster] using [1] data paths, mounts [[/ (/dev/sda2)]], net usable_space [83.6gb], net total_space [97.9gb], types [ext4]
[2019-06-26T15:39:19,302][INFO ][o.e.e.NodeEnvironment ] [elasticmaster] heap size [5.9gb], compressed ordinary object pointers [true]
[2019-06-26T15:39:19,423][INFO ][o.e.n.Node ] [elasticmaster] node name [elasticmaster], node ID [RhMwLe4rQO-oKoBjUxHFSw]
[2019-06-26T15:39:19,424][INFO ][o.e.n.Node ] [elasticmaster] version[6.6.1], pid[24480], build[default/deb/1fd8f69/2019-02-13T17:10:04.160291Z], OS[Linux/4.15.0-50-generic/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_201/25.201-b09]
[2019-06-26T15:39:19,424][INFO ][o.e.n.Node ] [elasticmaster] JVM arguments [-Xms6g, -Xmx6g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -Des.networkaddress.cache.ttl=60, -Des.networkaddress.cache.negative.ttl=10, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.io.tmpdir=/tmp/elasticsearch-6278558871907171410, -XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=/var/lib/elasticsearch, -XX:ErrorFile=/var/log/elasticsearch/hs_err_pid%p.log, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintTenuringDistribution, -XX:+PrintGCApplicationStoppedTime, -Xloggc:/var/log/elasticsearch/gc.log, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=32, -XX:GCLogFileSize=64m, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/etc/elasticsearch, -Des.distribution.flavor=default, -Des.distribution.type=deb]
[2019-06-26T15:39:20,019][ERROR][o.e.b.Bootstrap ] [elasticmaster] Exception
java.lang.IllegalStateException: failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]
at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:608) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:550) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:465) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:157) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.node.Node.<init>(Node.java:337) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.node.Node.<init>(Node.java:265) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:212) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~[elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) [elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) [elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) [elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) [elasticsearch-cli-6.6.1.jar:6.6.1]
at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) [elasticsearch-6.6.1.jar:6.6.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) [elasticsearch-6.6.1.jar:6.6.1]
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]