Hadoop新增節點報錯：

2021-06-28 16:02:12,489 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool BP-433041383-192.168.10.249-1494331993586 (Datanode Uuid 1e3d6ada-e61d-46fd-840b-1de724dd4aa0) service to yz-tpl-hadoop-10-251/192.168.10.251:8020 beginning handshake with NN
2021-06-28 16:02:12,492 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-433041383-192.168.10.249-1494331993586 (Datanode Uuid 1e3d6ada-e61d-46fd-840b-1de724dd4aa0) service to yz-tpl-hadoop-10-251/192.168.10.251:8020 Datanode denied communication with namenode because the host is not in the include-list: DatanodeRegistration(192.168.10.252:50010, datanodeUuid=1e3d6ada-e61d-46fd-840b-1de724dd4aa0, infoPort=50075, infoSecurePort=0, ipcPort=50020, storageInfo=lv=-56;cid=CID-2d472729-3f74-4306-91f4-359b84bf2e26;nsid=652116751;c=0)
        at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:876)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:4529)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:1279)
        at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:95)
        at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:28539)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

根據報錯顯示，初始化失敗，新增節點不在include-list檔案列表中，檢視hadoop hdfs-site.xml配置檔案，確定指定的include檔案是哪一個，檢驗新增節點是否在該配置檔案中。如果不存在則加入，然後在namenode重新重新整理DataNode節點；

命令：hdfsdfsadmin -fs hdfs://xx.xxx.x.xxx:8020 -refreshNodes //其中xx.xxx.x.xxx是active/standby namenode的IP（具體是哪個IP可根據報錯節點，或者配置不對的節點進行操作）；

參考：

https://blog.csdn.net/qq_34477362/article/details/84584381