Great god answer hadoop view logs refused to link-CodePudding

Java.net.ConnectException: Call From master/192.168.220.128 to master: 8020 failed on connection exception: java.net.ConnectException: rejected the connection. For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
At sun. Reflect. NativeConstructorAccessorImpl. NewInstance0 (Native Method)
At sun. Reflect. NativeConstructorAccessorImpl. NewInstance (NativeConstructorAccessorImpl. Java: 62)
At sun. Reflect. DelegatingConstructorAccessorImpl. NewInstance (DelegatingConstructorAccessorImpl. Java: 45)
The at Java. Lang. Reflect. Constructor. NewInstance (423) Constructor. Java:
At org.apache.hadoop.net.NetUtils.wrapWithMessage NetUtils. Java: (792)
At org.apache.hadoop.net.NetUtils.wrapException NetUtils. Java: (732)
At org, apache hadoop. Ipc. Client. Call (1479). The Client Java:
At org, apache hadoop. Ipc. Client. Call (1412). The Client Java:
At org, apache hadoop. Ipc. ProtobufRpcEngine $Invoker. Invoke (ProtobufRpcEngine. Java: 229)
At com. Sun. Proxy. $Proxy15. SendHeartbeat (Unknown Source)
At org, apache hadoop. HDFS. ProtocolPB. DatanodeProtocolClientSideTranslatorPB. SendHeartbeat (DatanodeProtocolClientSideTranslatorPB. Java: 152)
At org, apache hadoop. HDFS. Server. The datanode. BPServiceActor. SendHeartBeat (BPServiceActor. Java: 554)
At org, apache hadoop. HDFS. Server. The datanode. BPServiceActor. OfferService (BPServiceActor. Java: 653)
At org, apache hadoop. HDFS. Server. The datanode. BPServiceActor. Run (824) BPServiceActor. Java:
The at Java. Lang. Thread. The run (Thread. Java: 745)
Under Caused by: java.net.ConnectException: rejected the connection
At sun. Nio. Ch. SocketChannelImpl. CheckConnect (Native Method)
At sun. Nio. Ch. SocketChannelImpl. FinishConnect (SocketChannelImpl. Java: 717)
At org.apache.hadoop.net.SocketIOWithTimeout.connect SocketIOWithTimeout. Java: (206)
At org.apache.hadoop.net.NetUtils.connect NetUtils. Java: (531)
At org.apache.hadoop.net.NetUtils.connect NetUtils. Java: (495)
At org, apache hadoop. Ipc. Client $Connection. SetupConnection (614). The Client Java:
At org, apache hadoop. Ipc. Client $Connection. SetupIOstreams (712). The Client Java:
At org, apache hadoop. Ipc. Client $Connection. The access of $2900 (375). The Client Java:
At org, apache hadoop. Ipc. Client. GetConnection (1528). The Client Java:
At org, apache hadoop. Ipc. Client. Call (1451). The Client Java:
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