如题，elasticsearch cluster中，其中一个node无法正常启动elasticsearch，提示:
[2019-02-28T10:55:58,243][INFO ][o.e.d.z.ZenDiscovery ] [es-node-1] failed to send join request to master [{es-node-2}{THbImmRcQ7WdREIQcG4ndg}{cFtkVn3IRr-P_govy6pogQ}{10.x.x.16}{10.x.x.16:9300}{ml.machine_memory=8364892160, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true}], reason [RemoteTransportException[[es-node-2][10.x.x.16:9300][internal:discovery/zen/join]]; nested: IllegalStateException[index [.monitoring-es-6-2019.02.28/4a2KwUbjREKztB9u5hLwWg] version not supported: 6.5.1 the node version is: 6.5.0]; ]
这里的“version not supported: 6.5.1 the node version is: 6.5.0]; ]”，是指x-pack的版本吗？
检查cluster中所有node都是elasticsearch Version: 6.6.1, 这个问题如何解决？
启动log
elk@es-node1:/usr/share/elasticsearch/bin$ ./elasticsearch
[2019-02-28T11:17:25,850][INFO ][o.e.e.NodeEnvironment ] [es-node-1] using [1] data paths, mounts [[/ (/dev/mapper/Elastic--vg-root)]], net usable_space [15.9gb], net total_space [46.6gb], types [ext4]
[2019-02-28T11:17:25,856][INFO ][o.e.e.NodeEnvironment ] [es-node-1] heap size [990.7mb], compressed ordinary object pointers [true]
[2019-02-28T11:17:26,297][INFO ][o.e.n.Node ] [es-node-1] node name [es-node-1], node ID [ciTITOT3TmS3Ls6HzqFrxw]
[2019-02-28T11:17:26,298][INFO ][o.e.n.Node ] [es-node-1] version[6.5.0], pid[24080], build[default/deb/816e6f6/2018-11-09T18:58:36.352602Z], OS[Linux/4.4.0-62-generic/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_171/25.171-b11]
[2019-02-28T11:17:26,298][INFO ][o.e.n.Node ] [es-node-1] 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.jDg2svYd, -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]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [aggs-matrix-stats]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [analysis-common]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [ingest-common]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [lang-expression]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [lang-mustache]
[2019-02-28T11:17:28,651][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [lang-painless]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [mapper-extras]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [parent-join]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [percolator]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [rank-eval]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [reindex]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [repository-url]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [transport-netty4]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [tribe]
[2019-02-28T11:17:28,652][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-ccr]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-core]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-deprecation]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-graph]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-logstash]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-ml]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-monitoring]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-rollup]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-security]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-sql]
[2019-02-28T11:17:28,653][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-upgrade]
[2019-02-28T11:17:28,654][INFO ][o.e.p.PluginsService ] [es-node-1] loaded module [x-pack-watcher]
[2019-02-28T11:17:28,655][INFO ][o.e.p.PluginsService ] [es-node-1] no plugins loaded
[2019-02-28T11:17:32,938][INFO ][o.e.x.s.a.s.FileRolesStore] [es-node-1] parsed [0] roles from file [/etc/elasticsearch/roles.yml]
[2019-02-28T11:17:33,559][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [es-node-1] [controller/24142] [Main.cc@109] controller (64 bit): Version 6.5.0 (Build 71882a589e5556) Copyright (c) 2018 Elasticsearch BV
[2019-02-28T11:17:34,323][DEBUG][o.e.a.ActionModule ] [es-node-1] Using REST wrapper from plugin org.elasticsearch.xpack.security.Security
[2019-02-28T11:17:35,182][INFO ][o.e.d.DiscoveryModule ] [es-node-1] using discovery type [zen] and host providers [settings]
[2019-02-28T11:17:36,041][INFO ][o.e.n.Node ] [es-node-1] initialized
[2019-02-28T11:17:36,041][INFO ][o.e.n.Node ] [es-node-1] starting ...
[2019-02-28T11:17:36,326][INFO ][o.e.t.TransportService ] [es-node-1] publish_address {10.4.33.11:9300}, bound_addresses {10.4.33.11:9300}
[2019-02-28T11:17:36,432][INFO ][o.e.b.BootstrapChecks ] [es-node-1] bound or publishing to a non-loopback address, enforcing bootstrap checks
[2019-02-28T11:17:39,694][INFO ][o.e.d.z.ZenDiscovery ] [es-node-1] failed to send join request to master [{es-node-2}{THbImmRcQ7WdREIQcG4ndg}{cFtkVn3IRr-P_govy6pogQ}{10.x.x.16}{10.4.33.16:9300}{ml.machine_memory=8364892160, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true}], reason [RemoteTransportException[[es-node-2][10.x.x.16:9300][internal:discovery/zen/join]]; nested: IllegalStateException[index [.monitoring-es-6-2019.02.28/4a2KwUbjREKztB9u5hLwWg] version not supported: 6.5.1 the node version is: 6.5.0]; ]