在解决“starting namenodes on [localhost] error: attempting to operate on hdfs namen”这一问题时,我们可以按照以下步骤进行排查和解决: 检查Hadoop环境配置是否正确: 确保HADOOP_HOME环境变量已正确设置,并且指向Hadoop的安装目录。 检查core-site.xml和hdfs-site.xml配置文件,确认其中的配置项如fs.defaultFS(或...
Hadoop启动集群报错:Starting namenodes on [hadoop01] hadoop01: root@hadoop01: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password). 搭建三个hadoop集群的时候,master没有启动namenode和datanode, 报错: Starting namenodes on [hadoop01] hadoop01: root@hadoop01: Permission denied (publi...
在启动RPC服务之前,NameNode会加载hadoop-metrics2.properties配置文件,用于收集和发布系统的性能指标。 注册到ZooKeeper:在某些情况下,我们可以将NameNode的状态信息注册到ZooKeeper中,以实现高可用性。这样,如果当前的NameNode出现故障,可以快速切换到备用的NameNode。 启动Web界面:NameNode还提供了一个Web界面,用于查看集...
错误描述: [root@nna hadoop-3.2.2]# start-dfs.sh Starting namenodes on [nna nns] ERROR: Attempting to operate on hdfs namenode as root ERROR: but there is
server.common.Storage: Lock on /app/hadoop/tmp/dfs/name/in_use.lock acquired by nodename 14912@node01-standby2015-04-05 18:46:38,381 INFO org.apache.hadoop.ipcClient: Retrying connect to server: node01/192.168.171.147:8485. Already tried 0 time(s); retry policy is RetryU...
2022-05-01 14:00:49,299 INFO common.Storage (Storage.java:tryLock(776)) - Lock on /grid1/hadoop/hdfs/namenode/in_use.lock acquired by nodename 3716@digaudanaqamn2.gt.com 2022-05-01 14:00:49,354 INFO common.Storage (Storage.java:tryLock(776)) - Lock on /mnt/resource/hadoop/h...
/usr/local/Software/hadoop-2.2.0/logs/hadoop-sitaraman-namenode-localhost.localdomain.out Sitaraman On 12/24/13, Nitin Pawar <nitinpawar...@gmail.com> wrote: > Without log, very hard to guess what's happening. > > Can you clean up the log directory and then start over and check for ...
当前集群 主机名称 IP地址 角色 统一安装目录 统一安装用户 sht-sgmhadoopnn-01 172.16.101.55 namenode,resourcemanager /usr/local/hadoop(软连接) /usr/local/hadoop-2.7.4 /usr/local/zookeeper(软连接) /usr/local/zookeeper-3.4.9 root sht-s... ...
*http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/ whichonly has two nodes and the master acts as namenode and secondary namenode. I need one with more than that. Is there a way to prevent the node from using the central file system because I ...
hdfs.server.namenode.FSNamesystem: XAttrs enabled? true 2018-04-08 23:29:43,538 INFO org.apache.hadoophdfs.server.namenode.FSNamesystem: Maximum size of an xattr: 16384 2018-04-08 23:29:43,548 INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /mnt/dfs/nn/in_use.lo...