elasticsearch5.1.1 只要配置discovery打头的配置 就报下面的错。不配置就可以正常启动这是什么原因？
比如配置discovery.zen.ping.unicast.hosts ；discovery.zen.minimum_master_nodes 等等。
skipping exporter [default_local] as it isn't ready yet
2017-03-01T16:22:33,752[o.e.x.m.AgentService ] [node-1] exception when exporting documents
org.elasticsearch.xpack.monitoring.exporter.ExportException: exporters are either not ready or faulty
at org.elasticsearch.xpack.monitoring.exporter.Exporters.export(Exporters.java:188) ~[x-pack-5.1.1.jar:5.1.1]
at org.elasticsearch.xpack.monitoring.AgentService$ExportingWorker.run(AgentService.java:208) [x-pack-5.1.1.jar:5.1.1]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
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