LOG:
[email protected]:/opt/elasticsearch-5.5.0$ ls
bin  config  lib  LICENSE.txt  modules  NOTICE.txt  plugins  README.textile
[email protected]:/opt/elasticsearch-5.5.0$ ./bin/elasticsearch
[2017-07-12T14:57:36,651][INFO ][o.e.n.Node               ] [] initializing ...
[2017-07-12T14:57:36,721][INFO ][o.e.e.NodeEnvironment    ] [9rZOxk3] using [1
 
] data paths, mounts [[/ (/dev/vda1)]], net usable_space [230.6gb], net total_space [245.9gb], spins? [possibly], types [ext4]
[2017-07-12T14:57:36,722][INFO ][o.e.e.NodeEnvironment    ] [9rZOxk3] heap size [1.9gb], compressed ordinary object pointers [true]
[2017-07-12T14:57:36,723][INFO ][o.e.n.Node               ] node name [9rZOxk3] derived from node ID [9rZOxk3hS0Wmj6SPvU0ZSg]; set [node.name] to override
[
 
2017-07-12T14:57:36,723][INFO ][o.e.n.Node               ] version[5.5.0], pid[27006], build[260387d/2017-06-30T23:16:05.735Z], OS[Linux/4.4.0-63-generic/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_131/25.131-b11]
[2017-07-12T14:57:36,723][INFO ][o.e.n.Node               ] JVM arguments [-Xms2g, -Xmx2g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75
 
, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+DisableExplicitGC, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -Djdk.io.permissionsUseCanonicalPath=true, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Dlog4j.skipJansi=true, -XX:+HeapDumpOnOutOfMemoryError, -Des.path.home=/opt/elasticsearch-5.5.0]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [aggs-matrix-stats]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [ingest-common]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [lang-expression]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [lang-groovy]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [lang-mustache]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [lang-painless]
[2017-07-12T14:57:37,513][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [parent-join]
[2017-07-12T14:57:37,514][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [percolator]
[2017-07-12T14:57:37,514][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [reindex]
[2017-07-12T14:57:37,514][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [transport-netty3]
[2017-07-12T14:57:37,514][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded module [transport-netty4]
[2017-07-12T14:57:37,514][INFO ][o.e.p.PluginsService     ] [9rZOxk3] loaded plugin [mapper-size]
[2017-07-12T14:57:38,768][INFO ][o.e.d.DiscoveryModule    ] [9rZOxk3] using discovery type [zen]
[2017-07-12T14:57:39,323][INFO ][o.e.n.Node               ] initialized
[2017-07-12T14:57:39,324][INFO ][o.e.n.Node               ] [9rZOxk3] starting ...
[2017-07-12T14:57:39,463][INFO ][o.e.t.TransportService   ] [9rZOxk3] publish_address {127.0.0.1:9300}, bound_addresses {127.0.0.1:9300}
[2017-07-12T14:57:39,475][WARN ][o.e.b.BootstrapChecks    ] [9rZOxk3] max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]
[2017-07-12T14:57:39,476][WARN ][o.e.b.BootstrapChecks    ] [9rZOxk3] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2017-07-12T14:57:42,521][INFO ][o.e.c.s.ClusterService   ] [9rZOxk3] new_master {9rZOxk3}{9rZOxk3hS0Wmj6SPvU0ZSg}{Khs76coWR6qWwC9DjuhyeQ}{127.0.0.1}{127.0.0.1:9300}, reason: zen-disco-elected-as-master ([0] nodes joined)
[2017-07-12T14:57:42,543][INFO ][o.e.h.n.Netty4HttpServerTransport] [9rZOxk3] publish_address {127.0.0.1:9200}, bound_addresses {127.0.0.1:9200}
[2017-07-12T14:57:42,543][INFO ][o.e.n.Node               ] [9rZOxk3] started
[2017-07-12T14:57:42,555][INFO ][o.e.g.GatewayService     ] [9rZOxk3] recovered [0] indices into cluster_state