es6.7 Failed to clear cache for realms [[]] 出现报错，es都down了，怎么处理

来源：1-1 _课程导学

极客不忙

2019-07-29

at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:556) [netty-transport-4.1.32.Final.jar:4.1.32.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:510) [netty-transport-4.1.32.Final.jar:4.1.32.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:470) [netty-transport-4.1.32.Final.jar:4.1.32.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:909) [netty-common-4.1.32.Final.jar:4.1.32.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
[2019-07-29T16:32:27,464][WARN ][o.e.x.s.a.s.m.NativeRoleMappingStore] [prd_client_node4] Failed to clear cache for realms [[]]

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