Hadoop新增节点报错：
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)
根据报错显示，初始化失败，新增节点不在include-list文件列表中，查看hadoop hdfs-site.xml配置文件，确定指定的include文件是哪一个，检验新增节点是否在该配置文件中。如果不存在则加入，然后在namenode重新刷新DataNode节点；
命令：hdfs dfsadmin -fs hdfs://xx.xxx.x.xxx:8020 -refreshNodes //其中xx.xxx.x.xxx是active/standby namenode的IP（具体是哪个IP可根据报错节点，或者配置不对的节点进行操作）；
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