Please find more log data for your reference @DavidTurner
[2018-10-23T09:07:58,261][INFO ][o.e.e.NodeEnvironment ] [datanode1-lpdosput020034.phx.aexp.com] heap size [990.7mb], compressed ordinary object pointers [true]
[2018-10-23T09:07:58,271][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] node name [datanode1-lpdosput020034.phx.aexp.com], node ID [gS66sbvASX26ByNmk7fRWQ]
[2018-10-23T09:07:58,272][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] version[6.2.4], pid[1], build[ccec39f/2018-04-12T20:37:28.497551Z], OS[Linux/3.10.0-862.11.6.el7.x86_64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0_171/25.171-b10]
[2018-10-23T09:07:58,272][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] JVM arguments [-Xms1g, -Xmx1g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -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.EXryU7po, -XX:+HeapDumpOnOutOfMemoryError, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintTenuringDistribution, -XX:+PrintGCApplicationStoppedTime, -Xloggc:logs/gc.log, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=32, -XX:GCLogFileSize=64m, -Des.cgroups.hierarchy.override=/, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/usr/share/elasticsearch/config]
[2018-10-23T09:08:00,227][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [aggs-matrix-stats]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [analysis-common]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [ingest-common]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [lang-expression]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [lang-mustache]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [lang-painless]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [mapper-extras]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [parent-join]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [percolator]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [rank-eval]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [reindex]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [repository-url]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [transport-netty4]
[2018-10-23T09:08:00,228][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded module [tribe]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [ingest-geoip]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [ingest-user-agent]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-core]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-deprecation]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-graph]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-logstash]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-ml]
[2018-10-23T09:08:00,229][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-monitoring]
[2018-10-23T09:08:00,230][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-security]
[2018-10-23T09:08:00,230][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-upgrade]
[2018-10-23T09:08:00,230][INFO ][o.e.p.PluginsService ] [datanode1-lpdosput020034.phx.aexp.com] loaded plugin [x-pack-watcher]
[2018-10-23T09:08:02,532][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [controller/119] [Main.cc@128] controller (64 bit): Version 6.2.4 (Build 524e7fe231abc1) Copyright (c) 2018 Elasticsearch BV
[2018-10-23T09:08:03,130][INFO ][o.e.d.DiscoveryModule ] [datanode1-lpdosput020034.phx.aexp.com] using discovery type [zen]
[2018-10-23T09:08:03,796][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] initialized
[2018-10-23T09:08:03,796][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] starting ...
[2018-10-23T09:08:03,927][INFO ][o.e.t.TransportService ] [datanode1-lpdosput020034.phx.aexp.com] publish_address {172.18.0.3:9301}, bound_addresses {[::]:9301}
[2018-10-23T09:08:03,948][INFO ][o.e.b.BootstrapChecks ] [datanode1-lpdosput020034.phx.aexp.com] bound or publishing to a non-loopback address, enforcing bootstrap checks
[2018-10-23T09:08:33,973][WARN ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] timed out while waiting for initial discovery state - timeout: 30s
[2018-10-23T09:08:33,980][INFO ][o.e.h.n.Netty4HttpServerTransport] [datanode1-lpdosput020034.phx.aexp.com] publish_address {172.18.0.3:9200}, bound_addresses {[::]:9200}
[2018-10-23T09:08:33,980][INFO ][o.e.n.Node ] [datanode1-lpdosput020034.phx.aexp.com] started
[2018-10-23T09:08:37,007][INFO ][o.e.d.z.ZenDiscovery ] [datanode1-lpdosput020034.phx.aexp.com] failed to send join request to master [{node-lpdosput020036.phx.aexp.com}{jDOMBhIiToWXKpIMHtbGEw}{mCS4w9RqR3uPsMVo_Xwm8A}{10.3.237.23}{10.3.237.23:9300}], reason [RemoteTransportException[[node-lpdosput020036.phx.aexp.com][172.20.0.2:9300][internal:discovery/zen/join]]; nested: ConnectTransportException[[datanode1-lpdosput020034.phx.aexp.com][172.18.0.3:9301] connect_timeout[30s]]; ]