hadoop的namenode主从切换导致连到从机上无法读取目录Operation category READ is not supported in state standby

快来打我* 2024-03-27 11:19 43阅读 0赞

hadoop的namenode主从切换导致连到从机上无法读取目录, 应该使用core-site.xml中的fs.defaultFS中的value值进行连接,避免使用ip,否则namenode主从切换后就会这样。  
查看节点状态的命令：hdfs haadmin -getServiceState yourNamenodeName  
通常Active NameNode对外提供服务，而Standby NameNode则不对外提供服务，仅用来同步Active NameNode的状态。

2023-02-01 15:47:57,226 : INFO : LoggingFilter : RECEIVED: LIST
    2023-02-01 15:47:57,750 : WARN : NativeCodeLoader : Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error
            at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:88)
            at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:1835)
            at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:1515)
            at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:4448)
            at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getFileInfo(NameNodeRpcServer.java:912)
            at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.getFileInfo(AuthorizationProviderProxyClientProtocol.java:533)
            at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:862)
            at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
            at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
            at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
            at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2278)
            at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2274)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:422)
            at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
            at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2272)