datanode

ERROR in datanode execution while running Hadoop first time in Windows 10

▼魔方 西西 提交于 2020-01-21 10:02:21
问题 I am trying to run Hadoop 3.1.1 in my Windows 10 machine. I modified all the files: hdfs-site.xml mapred-site.xml core-site.xml yarn-site.xml Then, I executed the following command: C:\hadoop-3.1.1\bin> hdfs namenode -format The format ran correctly so I directed to C:\hadoop-3.1.1\sbin to execute the following command: C:\hadoop-3.1.1\sbin> start-dfs.cmd The command prompt opens 2 new windows: one for datanode and another for namenode. The namenode window keeps running: 2018-09-02 21:37:06

Hadoop 搭建全分布模式子节点的datanode未起来的解决办法

天大地大妈咪最大 提交于 2019-12-05 17:55:19
搭建全分布模式hadoop的时候,子节点的datanode没有起来: 解决办法参考如下网站: https://blog.csdn.net/u013310025/article/details/52796233 总结: 在全分布模式下,将hadoop文件用scp -r ~/training/hadoop2.7.3 root@bigdata112 ~/training/后,需要在各节点也执行hdfs namenode -format才行,否则启动hadoop,节点的datanode起不了会报如下的错误。(此结论需要后期再进行验证) 解决办法(选择了方法二,方法一尝试了无效): 方法1.进入tmp/dfs,修改VERSION文件即可,将nameNode里version文件夹里面的内容修改成和master一致的。 方法2.直接删除tmp/dfs,然后格式化hdfs即可(./hdfs namenode -format)重新在tmp目录下生成一个dfs文件 ervices: 2018-04-20 23:41:33,881 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool (Datanode Uuid unassigned) service to bigdata111/169.254.169.111:9000

localhost: ERROR: Cannot set priority of datanode process 32156

怎甘沉沦 提交于 2019-12-01 06:21:55
I am trying to install hadoop on ubuntu 16.04 but while starting the hadoop it will give me following error localhost: ERROR: Cannot set priority of datanode process 32156. Starting secondary namenodes [it-OptiPlex-3020] 2017-09-18 21:13:48,343 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting resourcemanager Starting nodemanagers Please someone tell me why i am getting this error ? Thanks in advance. stana.he I have run into the same error when installing Hadoop 3.0.0-RC0. My situation was all services

解决hadoop集群中datanode启动后自动关闭的问题

て烟熏妆下的殇ゞ 提交于 2019-11-29 09:06:53
ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /var/lib/hadoop-0.20/cache/hdfs/dfs/data: namenode namespaceID = 240012870; datanode namespaceID = 1462711424 .    问题 :Namenode上namespaceID与datanode上namespaceID不一致。     问题产生原因 : 每次namenode format会重新创建一个namenodeId,而tmp/dfs/data下包含了上次format下的id,namenode format清空了namenode下的数据,但是没有清空datanode下的数据,所以造成namenode节点上的namespaceID与datanode节点上的namespaceID不一致。启动失败。   第一种解决方法:即:   ( 1 )停掉集群服务   ( 2 )在出问题的datanode节点上删除data目录,data目录即是在hdfs-site.xml文件中配置的dfs.data.dir目录,本机器上那个是/var/lib/hadoop-0.20/cache/hdfs

localhost: ERROR: Cannot set priority of datanode process 32156

被刻印的时光 ゝ 提交于 2019-11-28 04:18:33
问题 I am trying to install hadoop on ubuntu 16.04 but while starting the hadoop it will give me following error localhost: ERROR: Cannot set priority of datanode process 32156. Starting secondary namenodes [it-OptiPlex-3020] 2017-09-18 21:13:48,343 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting resourcemanager Starting nodemanagers Please someone tell me why i am getting this error ? Thanks in advance. 回答1

【原创】centos自带网卡驱动不兼容硬件,造成hadoop的datanode节点频繁宕机的解...

左心房为你撑大大i 提交于 2019-11-27 13:07:11
操作系统 :CentOS Linux 6.0(Final) 内核 : Linux 2.6.32 硬件 : HP 3300 Series MT ,内存增加到6G。 Hadoop集群: 一台NameNode 同时作为client node、三台DataNode。数据备份为3分,即dif.replication = 3 。 笔者在测试hadoop性能过程中,在向hadoop集群中put大量数据(50G)的时候,集群中的datanode节点频繁宕机。并且在centos日志系统中没有关于datanode宕机的错误报告。 因为hadoop的测试数据是存放在namenode 中的,所以namenode同时也是client node。经过笔者观察发现,宕机的只是datanode,而client node从来不宕机。在hadoop put数据的过程中,通过ganglia观察到client node的系统负载率要要远远高于datanode 。繁忙的client node不宕机,而相对系统负载率低的datanode却频繁死机,说明了datanode宕机与cpu、内存无关。笔者将目光转向了磁盘I/O和网络I/O。 首先,考虑是否因为磁盘I/O频繁操作引起的datanode系统宕机。因为测试数据存放在client node上,所以要在clent node上进行大量的磁盘读取数据操作。client