Here is the file /var/log/elasticsearch/elasticsearch.log
the file is too big, i cannot post all charaters
[2019-04-26T16:57:10,957][INFO ][o.e.e.NodeEnvironment ] [elasticsearch] using [1] data paths, mounts [[/ (/dev/vda2)]], net usable_space [67.3gb], net total_space [78.2gb], types [ext4]
[2019-04-26T16:57:10,968][INFO ][o.e.e.NodeEnvironment ] [elasticsearch] heap size [990.7mb], compressed ordinary object pointers [true]
[2019-04-26T16:57:10,976][INFO ][o.e.n.Node ] [elasticsearch] node name [elasticsearch], node ID [zO9bT0cPRge2IlKzzRWLpg]
[2019-04-26T16:57:10,977][INFO ][o.e.n.Node ] [elasticsearch] version[7.0.0], pid[20343], build[default/deb/b7e28a7/2019-04-05T22:55:32.697037Z], OS[Linux/4.15.0-48-generic/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/12/12+33]
[2019-04-26T16:57:10,978][INFO ][o.e.n.Node ] [elasticsearch] JVM home [/usr/share/elasticsearch/jdk]
[2019-04-26T16:57:10,978][INFO ][o.e.n.Node ] [elasticsearch] JVM arguments [-Xms1g, -Xmx1g, -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-5110676073795515784, -XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=/var/lib/elasticsearch, -XX:ErrorFile=/var/log/elasticsearch/hs_err_pid%p.log, -Xlog:gc*,gc+age=trace,safepoint:file=/var/log/elasticsearch/gc.log:utctime,pid,tags:filecount=32,filesize=64m, -Djava.locale.providers=COMPAT, -Dio.netty.allocator.type=unpooled, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/etc/elasticsearch, -Des.distribution.flavor=default, -Des.distribution.type=deb, -Des.bundled_jdk=true]
[2019-04-26T16:57:15,915][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [aggs-matrix-stats]
[2019-04-26T16:57:15,919][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [analysis-common]
[2019-04-26T16:57:15,920][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [ingest-common]
[2019-04-26T16:57:15,921][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [ingest-geoip]
[2019-04-26T16:57:15,922][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [ingest-user-agent]
[2019-04-26T16:57:15,922][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [lang-expression]
[2019-04-26T16:57:15,923][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [lang-mustache]
[2019-04-26T16:57:15,923][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [lang-painless]
[2019-04-26T16:57:15,924][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [mapper-extras]
[2019-04-26T16:57:15,924][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [parent-join]
[2019-04-26T16:57:15,924][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [percolator]
[2019-04-26T16:57:15,925][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [rank-eval]
[2019-04-26T16:57:15,927][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [reindex]
[2019-04-26T16:57:15,927][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [repository-url]
[2019-04-26T16:57:15,927][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [transport-netty4]
[2019-04-26T16:57:15,928][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-ccr]
[2019-04-26T16:57:15,928][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-core]
[2019-04-26T16:57:15,928][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-deprecation]
[2019-04-26T16:57:15,929][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-graph]
[2019-04-26T16:57:15,929][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-ilm]
[2019-04-26T16:57:15,930][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-logstash]
[2019-04-26T16:57:15,930][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-ml]
[2019-04-26T16:57:15,931][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-monitoring]
[2019-04-26T16:57:15,931][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-rollup]
[2019-04-26T16:57:15,931][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-security]
[2019-04-26T16:57:15,932][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-sql]
[2019-04-26T16:57:15,932][INFO ][o.e.p.PluginsService ] [elasticsearch] loaded module [x-pack-watcher]
[2019-04-26T16:57:15,934][INFO ][o.e.p.PluginsService ] [elasticsearch] no plugins loaded
[2019-04-26T16:57:27,549][INFO ][o.e.x.s.a.s.FileRolesStore] [elasticsearch] parsed [0] roles from file [/etc/elasticsearch/roles.yml]
[2019-04-26T16:57:39,520][ERROR][o.e.b.Bootstrap ] [elasticsearch] Exception
org.elasticsearch.ElasticsearchException: Failed to create native process factories for Machine Learning
at org.elasticsearch.xpack.ml.MachineLearning.createComponents(MachineLearning.java:427) ~[?:?]
at org.elasticsearch.node.Node.lambda$new$9(Node.java:438) ~[elasticsearch-7.0.0.jar:7.0.0]
at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271) ~[?:?]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[?:?]