en-disco-elected-as-master ([0] nodes joined)]])
[2018-02-13T08:24:00,678][ERROR][o.e.x.m.c.i.IndexStatsCollector] [6wPQIP5] collector [index-stats] failed to collect data
org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/1/state not recovered / initialized];
        at org.elasticsearch
 
.cluster.block.ClusterBlocks.globalBlockedException(ClusterBlocks.java:165) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.admin.indices.stats.TransportIndicesStatsAction.checkGlobalBlock(TransportIndicesStatsAction.java:68) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch
 
.action.admin.indices.stats.TransportIndicesStatsAction.checkGlobalBlock(TransportIndicesStatsAction.java:45) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction$AsyncAction.<init>(TransportBroadcastByNodeAction.java:256) ~[elasticsearch-6.2
 
.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:234) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:79) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:167) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:139) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:81) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.node.NodeClient.executeLocally(NodeClient.java:83) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.node.NodeClient.doExecute(NodeClient.java:72) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:405) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:394) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1247) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:46) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:60) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.collector.indices.IndexStatsCollector.doCollect(IndexStatsCollector.java:87) ~[x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.collector.Collector.collect(Collector.java:99) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.MonitoringService$MonitoringExecution$1.doRun(MonitoringService.java:221) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_111]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_111]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:566) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_111]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_111]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
[2018-02-13T08:24:02,535][ERROR][o.e.x.m.c.c.ClusterStatsCollector] [6wPQIP5] collector [cluster_stats] failed to collect data
java.lang.NullPointerException: null
        at org.elasticsearch.xpack.monitoring.collector.cluster.ClusterStatsCollector.doCollect(ClusterStatsCollector.java:119) ~[x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.collector.Collector.collect(Collector.java:99) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.MonitoringService$MonitoringExecution$1.doRun(MonitoringService.java:221) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_111]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_111]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:566) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_111]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_111]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
[2018-02-13T08:24:02,556][ERROR][o.e.x.m.c.i.IndexRecoveryCollector] [6wPQIP5] collector [index_recovery] failed to collect data
org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/1/state not recovered / initialized];
        at org.elasticsearch.cluster.block.ClusterBlocks.globalBlockedException(ClusterBlocks.java:165) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.admin.indices.recovery.TransportRecoveryAction.checkGlobalBlock(TransportRecoveryAction.java:114) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.admin.indices.recovery.TransportRecoveryAction.checkGlobalBlock(TransportRecoveryAction.java:52) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction$AsyncAction.<init>(TransportBroadcastByNodeAction.java:256) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:234) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:79) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:167) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:139) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:81) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.node.NodeClient.executeLocally(NodeClient.java:83) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.node.NodeClient.doExecute(NodeClient.java:72) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:405) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:394) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1247) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:46) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:60) ~[elasticsearch-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.collector.indices.IndexRecoveryCollector.doCollect(IndexRecoveryCollector.java:88) ~[x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.collector.Collector.collect(Collector.java:99) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.xpack.monitoring.MonitoringService$MonitoringExecution$1.doRun(MonitoringService.java:221) [x-pack-monitoring-6.2.1.jar:6.2.1]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_111]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_111]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:566) [elasticsearch-6.2.1.jar:6.2.1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_111]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_111]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
[2018-02-13T08:24:02,743][INFO ][o.e.l.LicenseService     ] [6wPQIP5] license [7c713766-5958-45a2-807e-9be2877bea4b] mode [trial] - valid
[2018-02-13T08:24:02,795][INFO ][o.e.g.GatewayService     ] [6wPQIP5] recovered [9] indices into cluster_state
[2018-02-13T08:24:07,780][INFO ][o.e.c.r.a.AllocationService] [6wPQIP5] Cluster health status changed from [RED] to [GREEN] (reason: [shards started [[.monitoring-es-6-2018.02.11][0]] ...]).
[2018-02-13T08:24:07,899][INFO ][o.e.h.n.Netty4HttpServerTransport] [6wPQIP5] publish_address {127.0.0.1:9200}, bound_addresses {127.0.0.1:9200}, {[::1]:9200}
[2018-02-13T08:24:07,901][INFO ][o.e.n.Node               ] [6wPQIP5] started
[2018-02-13T08:28:01,967][INFO ][o.e.n.Node               ] [6wPQIP5] stopping ...
[2018-02-13T08:28:02,588][INFO ][o.e.n.Node               ] [6wPQIP5] stopped
[2018-02-13T08:28:02,591][INFO ][o.e.n.Node               ] [6wPQIP5] closing ...
[2018-02-13T08:28:02,623][INFO ][o.e.n.Node               ] [6wPQIP5] closed

解決：
在J:\elasticsearch\elasticsearch-6.2.1\config\elasticsearch.yml檔案下新增

network.host: 127.0.0.1
http.port: 9200

因為localhost不被發現