org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode 这个错误应该还满常见的吧（⾄少我运⾏的时候是这样的）那我们来分析下这个错误，从字⾯上来理解：Name node is in safe mode 说明Hadoop的NameNode处在安全模式下。那什么是Hadoop的安全模式呢？在...
原因是namenode处于安全模式,首先尝试强制退出安全模式 hadoop dfsadmin -safemode leave 终端显示 Safe mode is OFF,奇怪的是还是显示namenode is in safe mode. 此时输入hdfs dfsadmin -safemode get 了解到namenode安全模式机制是当硬盘使用超过90%时,namenode就会进入安全模式,强制退出也不行。 接着检查namenode...
运行Hadoop程序时,有时候会报以下错误: org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode 这个错误应该还满常见的吧(至少我运行的时候是这样的) 那我们来分析下这个错误,从字面上来理解: Name node is in safe mode 说明Hadoop的NameNode处在安全模式下。
dfs.namenode.replication.min #最小块副本数,默认1 dfs.namenode.safemode.threshold-pct #已汇报可用数据块数量占整体块数量的百分比阈值。默认0.999f,小于或等于0,则表示退出安全模式之前,不要等待特定百分比的块。大于1的值将使安全模式永久生效。 dfs.namenode.safemode.min.datanodes #指在退出安全模式之前必...
说明:突然重启电脑后,重新开启hadoop,启动hive,出现以下错误: Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeMo deException): Cannot create directory /tmp/hive/root/9dc0dfcd-a02d-41f3-b524-dc85089e4c3f. Name node is in safe mode. ...
4.Name node is in safe mode 去NameNode的机器执行离开安全的操作 离开安全模式 5.It is not protected because it is world-writable /var/run的权限过大, 把/var/run/hdfs-sockets目录删掉或重新授权 6. DataNode的报错 could only be written to 0 of the 1 minReplication nodes. There are 0 datanode...
当Hadoop NameNode 处于safemode 时,DataNode 对于客户端而言是read-only的。 当启动 Hadoop 时需要启动 NameNode,在启动 NameNode 时,需要将镜像文件fsimage载入内存,并执行编辑日志edits log中的所有操作,以建立完整的文件系统的元数据metadata(创建新的fsimage文件和空的edits log)。在这个过程中,NameNode 将一直处...
Safe mode is OFF # 创建一个测试文件 [wangting@wt-hadoop101 ~]$ echo `date +%H%M%S` >> date.log [wangting@wt-hadoop101 ~]$ cat date.log 173241 #将date.log文件put到hdfs集群存储上 [wangting@wt-hadoop101 ~]$ hdfs dfs -put /home/wangting/date.log / ...
Log queueTime= 6 procesingTime= 0 exception=SafeModeException2017-08-29 00:30:52,202DEBUG org.apache.hadoop.security.UserGroupInformation: PrivilegedActionException as:root (auth:SIMPLE) cause:org.apache.hadoop.hdfs.server.namenode.SafeModeException: Log not rolled. Name node is in safe mode....
Namenode safe mode Labels: Apache Ambari Apache Hadoop sreeviswa_athic Super Collaborator Created 03-14-2017 12:11 AM During maintenance of Cluster, we put Namenode into Safemode. How to identify if Namenode is in safemode. I mean is there a command which tells us if Namenode is...