OK，first, exception:
[2017-05-10T19:06:35,643][WARN ][o.e.g.DanglingIndicesState] [node-210] [[.monitoring-es-2-2017.05.02/jVQiwq7YSeCqzyikNI-uAQ]] can not be imported as a dangling index, as an index with the same name and UUID exist in the index tombstones. This situation is likely caused by copying over the data directory for an index that was previously deleted.
[2017-05-10T19:06:35,641][WARN ][o.e.x.m.MonitoringService] [node-210] monitoring execution failed
org.elasticsearch.xpack.monitoring.exporter.ExportException: Exception when closing export bulk
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$1$1.(ExportBulk.java:106) ~[?:?]
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$1.onFailure(ExportBulk.java:104) ~[?:?]
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$Compound$1.onResponse(ExportBulk.java:217) ~[?:?]
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$Compound$1.onResponse(ExportBulk.java:211) ~[?:?]
at org.elasticsearch.xpack.common.IteratingActionListener.onResponse(IteratingActionListener.java:108) ~[?:?]
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$Compound.lambda$null$0(ExportBulk.java:175) ~[?:?]
at org.elasticsearch.action.ActionListener$1.onFailure(ActionListener.java:67) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.throwExportException(LocalBulk.java:132) ~[?:?]
at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.lambda$doFlush$0(LocalBulk.java:112) ~[?:?]
at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:59) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.ContextPreservingActionListener.onResponse(ContextPreservingActionListener.java:43) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.TransportAction$1.onResponse(TransportAction.java:88) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.TransportAction$1.onResponse(TransportAction.java:84) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.lambda$apply$0(SecurityActionFilter.java:121) ~[?:?]
at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:59) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.ContextPreservingActionListener.onResponse(ContextPreservingActionListener.java:43) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.bulk.TransportBulkAction$BulkRequestModifier.lambda$wrapActionListenerIfNeeded$0(TransportBulkAction.java:560) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:59) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.bulk.TransportBulkAction$BulkOperation$1.finishHim(TransportBulkAction.java:368) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.bulk.TransportBulkAction$BulkOperation$1.onFailure(TransportBulkAction.java:363) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.TransportAction$1.onFailure(TransportAction.java:94) ~[elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.ActionListener$1.onFailure(ActionListener.java:67) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.ContextPreservingActionListener.onFailure(ContextPreservingActionListener.java:50) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.finishAsFailed(TransportReplicationAction.java:827) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.retry(TransportReplicationAction.java:797) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.retryBecauseUnavailable(TransportReplicationAction.java:862) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.retryIfUnavailable(TransportReplicationAction.java:699) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.doRun(TransportReplicationAction.java:653) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase$2.onTimeout(TransportReplicationAction.java:816) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:311) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:238) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.cluster.service.ClusterService$NotifyTimeout.run(ClusterService.java:1162) [elasticsearch-5.3.0.jar:5.3.0]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:544) [elasticsearch-5.3.0.jar:5.3.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_73]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_73]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_73]
Caused by: org.elasticsearch.xpack.monitoring.exporter.ExportException: failed to flush export bulks
at org.elasticsearch.xpack.monitoring.exporter.ExportBulk$Compound.lambda$null$0(ExportBulk.java:167) ~[?:?]
... 31 more
Caused by: org.elasticsearch.xpack.monitoring.exporter.ExportException: bulk [default_local] reports failures when exporting documents
at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.throwExportException(LocalBulk.java:124) ~[?:?]
... 29 more
second, other nodes has this message:
[2017-05-10T20:04:05,868][WARN ][o.e.l.LicenseService ] [node-204]