报什么错 ERROR YarnSchedulerBackend$YarnSchedulerEndpoint Sending RequestExecutors00MapSet to AM was unsuccessfuljavaioIOException Failed to send RPC 5433534396861279183 to 10254169160312 javaniochannelsC

这个错误是YarnSchedulerBackend发送请求给AM时失败了。具体的错误信息是Failed to send RPC 5433534396861279183 to /10.254.16.91:60312: java.nio.channels.ClosedChannelException。

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