Here is the logZ
cat elasticsearch.log
[2021-04-30T13:30:45,944][INFO ][o.e.e.NodeEnvironment ] [loges-prod-15-uv03.] using [1] data paths, mounts [[/var/lib/elasticsearch (/dev/mapper/vg1-data)]], net usable_space [1.9tb], net total_space [1.9tb], types [xfs]
[2021-04-30T13:30:45,948][INFO ][o.e.e.NodeEnvironment ] [loges-prod-15-uv03.] heap size [990.7mb], compressed ordinary object pointers [true]
[2021-04-30T13:30:45,950][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] node name [loges-prod-15-uv03.], node ID [3HZeqohlSSS73Fl0gPY-bA], cluster name [elasticsearch]
[2021-04-30T13:30:45,951][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] version[7.4.1], pid[2866], build[default/rpm/fc0eeb6e2c25915d63d871d344e3d0b45ea0ea1e/2019-10-22T17:16:35.176724Z], OS[Linux/3.10.0-1160.11.1.el7.x86_64/amd64], JVM[AdoptOpenJDK/OpenJDK 64-Bit Server VM/13/13+33]
[2021-04-30T13:30:45,951][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] JVM home [/usr/share/elasticsearch/jdk]
[2021-04-30T13:30:45,952][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] 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, -Dio.netty.allocator.numDirectArenas=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.io.tmpdir=/tmp/elasticsearch-12745454016527767902, -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, -XX:MaxDirectMemorySize=536870912, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/etc/elasticsearch, -Des.distribution.flavor=default, -Des.distribution.type=rpm, -Des.bundled_jdk=true]
[2021-04-30T13:30:47,612][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [aggs-matrix-stats]
[2021-04-30T13:30:47,612][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [analysis-common]
[2021-04-30T13:30:47,612][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [data-frame]
[2021-04-30T13:30:47,612][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [flattened]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [frozen-indices]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [ingest-common]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [ingest-geoip]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [ingest-user-agent]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [lang-expression]
[2021-04-30T13:30:47,613][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [lang-mustache]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [lang-painless]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [mapper-extras]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [parent-join]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [percolator]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [rank-eval]
[2021-04-30T13:30:47,614][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [reindex]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [repository-url]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [search-business-rules]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [spatial]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [systemd]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [transport-netty4]
[2021-04-30T13:30:47,615][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [vectors]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-analytics]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-ccr]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-core]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-deprecation]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-graph]
[2021-04-30T13:30:47,616][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-ilm]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-logstash]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-ml]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-monitoring]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-rollup]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-security]
[2021-04-30T13:30:47,617][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-sql]
[2021-04-30T13:30:47,618][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-voting-only-node]
[2021-04-30T13:30:47,618][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] loaded module [x-pack-watcher]
[2021-04-30T13:30:47,618][INFO ][o.e.p.PluginsService ] [loges-prod-15-uv03.] no plugins loaded
[2021-04-30T13:30:51,036][INFO ][o.e.x.s.a.s.FileRolesStore] [loges-prod-15-uv03.] parsed [0] roles from file [/etc/elasticsearch/roles.yml]
[2021-04-30T13:30:51,506][INFO ][o.e.x.m.p.l.CppLogMessageHandler] [loges-prod-15-uv03.] [controller/2960] [Main.cc@110] controller (64 bit): Version 7.4.1 (Build 973380bdacc5e8) Copyright (c) 2019 Elasticsearch BV
[2021-04-30T13:30:52,061][DEBUG][o.e.a.ActionModule ] [loges-prod-15-uv03.] Using REST wrapper from plugin org.elasticsearch.xpack.security.Security
[2021-04-30T13:30:52,359][INFO ][o.e.d.DiscoveryModule ] [loges-prod-15-uv03.] using discovery type [zen] and seed hosts providers [settings]
[2021-04-30T13:30:53,112][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] initialized
[2021-04-30T13:30:53,113][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] starting ...
[2021-04-30T13:30:53,254][INFO ][o.e.t.TransportService ] [loges-prod-15-uv03.] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
[2021-04-30T13:30:53,287][WARN ][o.e.b.BootstrapChecks ] [loges-prod-15-uv03.] the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
[2021-04-30T13:30:53,292][INFO ][o.e.c.c.Coordinator ] [loges-prod-15-uv03.] cluster UUID [JQASlHJoQlO737P9hPV6cg]
[2021-04-30T13:30:53,300][INFO ][o.e.c.c.ClusterBootstrapService] [loges-prod-15-uv03.] no discovery configuration found, will perform best-effort cluster bootstrapping after [3s] unless existing master is discovered
[2021-04-30T13:30:53,459][INFO ][o.e.c.s.MasterService ] [loges-prod-15-uv03.] elected-as-master ([1] nodes joined)[{loges-prod-15-uv03.}{3HZeqohlSSS73Fl0gPY-bA}{CcCuyed4Qqq_zAvf00gNPw}{127.0.0.1}{127.0.0.1:9300}{dilm}{ml.machine_memory=16637538304, xpack.installed=true, ml.max_open_jobs=20} elect leader, _BECOME_MASTER_TASK_, _FINISH_ELECTION_], term: 3, version: 21, reason: master node changed {previous [], current [{loges-prod-15-uv03.}{3HZeqohlSSS73Fl0gPY-bA}{CcCuyed4Qqq_zAvf00gNPw}{127.0.0.1}{127.0.0.1:9300}{dilm}{ml.machine_memory=16637538304, xpack.installed=true, ml.max_open_jobs=20}]}
[2021-04-30T13:30:53,507][INFO ][o.e.c.s.ClusterApplierService] [loges-prod-15-uv03.] master node changed {previous [], current [{loges-prod-15-uv03.}{3HZeqohlSSS73Fl0gPY-bA}{CcCuyed4Qqq_zAvf00gNPw}{127.0.0.1}{127.0.0.1:9300}{dilm}{ml.machine_memory=16637538304, xpack.installed=true, ml.max_open_jobs=20}]}, term: 3, version: 21, reason: Publication{term=3, version=21}
[2021-04-30T13:30:53,577][INFO ][o.e.h.AbstractHttpServerTransport] [loges-prod-15-uv03.] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
[2021-04-30T13:30:53,577][INFO ][o.e.n.Node ] [loges-prod-15-uv03.] started
[2021-04-30T13:30:53,732][INFO ][o.e.l.LicenseService ] [loges-prod-15-uv03.] license [65da0ec5-43a4-429e-ab7a-d915d2a70d23] mode [basic] - valid
[2021-04-30T13:30:53,733][INFO ][o.e.x.s.s.SecurityStatusChangeListener] [loges-prod-15-uv03.] Active license is now [BASIC]; Security is disabled
[2021-04-30T13:30:53,742][INFO ][o.e.g.GatewayService ] [loges-prod-15-uv03.] recovered [0] indices into cluster_state
[2021-04-30T13:31:23,555][TRACE][o.e.a.a.i.s.TransportIndicesStatsAction] [loges-prod-15-uv03.] resolving shards for [indices:monitor/stats] based on cluster state version [23]
[2021-04-30T13:31:53,561][TRACE][o.e.a.a.i.s.TransportIndicesStatsAction] [loges-prod-15-uv03.] resolving shards for [indices:monitor/stats] based on cluster state version [23]
[2021-04-30T13:32:23,565][TRACE][o.e.a.a.i.s.TransportIndicesStatsAction] [loges-prod-15-uv03.] resolving shards for [indices:monitor/stats] based on cluster state version [23]
[2021-04-30T13:32:53,568][TRACE][o.e.a.a.i.s.TransportIndicesStatsAction] [loges-prod-15-uv03.] resolving shards for [indices:monitor/stats] based on cluster state version [23]