错误
[root@hdp01 etc]# hdfs dfs -rm -r /data/log/log_format/2020-11-06/logstart-.1604630235482.tmp
20/11/09 10:54:26 WARN fs.TrashPolicyDefault: Can't create trash directory: hdfs://*****:8020/user/hdfs/.Trash/Current/data/log/log_format/2020-11-06
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /user/hdfs/.Trash/Current/data/log/log_format/2020-11-06. Name node is in safe mode.
Resources are low on NN. Please add or free up more resources then turn off safe mode manually. NOTE: If you turn off safe mode before adding resources, the NN will immediately return to safe mode. Use "hdfs dfsadmin -safemode leave" to turn safe mode off.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkNameNodeSafeMode(FSNamesystem.java:1418)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:4180)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:1109)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:645)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:640)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2351)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2347)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2347)
at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1554)
at org.apache.hadoop.ipc.Client.call(Client.java:1498)
at org.apache.hadoop.ipc.Client.call(Client.java:1398)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:233)
at com.sun.proxy.$Proxy10.mkdirs(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.mkdirs(ClientNamenodeProtocolTranslatorPB.java:610)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:291)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:203)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:185)
at com.sun.proxy.$Proxy11.mkdirs(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:3073)
at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:3043)
at org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1181)
at org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1177)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirsInternal(DistributedFileSystem.java:1195)
at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:1169)
at org.apache.hadoop.fs.TrashPolicyDefault.moveToTrash(TrashPolicyDefault.java:147)
at org.apache.hadoop.fs.Trash.moveToTrash(Trash.java:109)
at org.apache.hadoop.fs.Trash.moveToAppropriateTrash(Trash.java:95)
at org.apache.hadoop.fs.shell.Delete$Rm.moveToTrash(Delete.java:153)
at org.apache.hadoop.fs.shell.Delete$Rm.processPath(Delete.java:118)
at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:317)
at org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:289)
at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:271)
at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:255)
at org.apache.hadoop.fs.shell.FsCommand.processRawArguments(FsCommand.java:119)
at org.apache.hadoop.fs.shell.Command.run(Command.java:165)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:297)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
at org.apache.hadoop.fs.FsShell.main(FsShell.java:356)
rm: Failed to move to trash: hdfs://*****:8020/data/log/log_format/2020-11-06/logstart-.1604630235482.tmp: Cannot create directory /user/hdfs/.Trash/Current/data/log/log_format/2020-11-06. Name node is in safe mode.
解决方法：
使用 hdfs dfsadmin -safemode leave 关闭NameNode 安全模式
当使用时一直不成功
报一个这个错误，是由空间太满导致的，通过WinScp工具删除一些数据，比如说是一些解压包什么的或者是/var/log/下面的日志，在执行的关闭安全模式的时候，可以删除数据了
