hadoop nodes

In the previous post there is a description of dynamically adding a node, this time explains how to dynamically delete a node.In the previous post there is a tutorial on how to limit the connection of a node, to dynamically delete a node, you can configure on this basis.1. Configure the Dfs.hosts.exclude on the host1Add Host4 to the file specified by Dfs.hosts.exclude:Then execute the following command:hadoop dfsadmin -refreshNodesThen use the following command to view:hadoop dfsadmin -repor

A virtual machine was started on Shanda cloud. The default user is root. An error occurred while running hadoop: [Error description] Root @ snda:/data/soft/hadoop-0.20.203.0 # bin/hadoop FS-put conf Input11/08/03 09:58:33 warn HDFS. dfsclient: datastreamer exception: Org. apache. hadoop. IPC. remoteException: Java. io.

When Hadoop was started today, it was discovered that Datanode could not boot, and the following errors were found in the View log: Java.io.ioexception:file/opt/hadoop/tmp/mapred/system/jobtracker.info could only is replicated to 0 nodes, instead o F 1 at Org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock (fsnamesystem.java:1271) at Org.apac

Exception Analysis 1. "cocould only be replicated to 0 nodes, instead of 1" Exception (1) exception description The configuration above is correct and the following steps have been completed: [Root @ localhost hadoop-0.20.0] # bin/hadoop namenode-format [Root @ localhost hadoop-0.20.0] # bin/start-all.sh At this time,

Root @ scutshuxue-desktop:/home/root/hadoop-0.19.2 # bin/hadoop FS-put conf input10/07/18 12:31:05 info HDFS. dfsclient: Org. apache. hadoop. IPC. remoteException: Java. io. ioexception: File/user/root/input/log4j. properties cocould only be replicated to 0 nodes, instead of 1At org. Apache.

Hadoop version: hadoop-2.5.1-x64.tar.gz The study referenced the Hadoop build process for the two nodes of the http://www.powerxing.com/install-hadoop-cluster/, I used VirtualBox to open four Ubuntu (version 15.10) virtual machines, build four

4. Modify config file vi hadoop-2.6.0/etc/hadoop/hdfs-site.xml, add (Hadoop user action) 5. Modify config file vi etc/hadoop/mapred-site.xml (Hadoop user action) This file does not need to be copied in a copy (CD

Hadoop Error "could only is replicated to 0 nodes, instead of 1"root@scutshuxue-desktop:/home/root/hadoop-0.19.2# bin/hadoop fs-put conf input10/07/18 12:31:05 INFO HDFs. Dfsclient:org.apache.hadoop.ipc.remoteexception:java.io.ioexception:file/user/root/input/log4j.properties could Only being replicated to 0

permissions and# Limitations under the License.# Stop Hadoop DFS daemons. Run this on master node.bin= ' DirName ' "Bin= ' CD "$bin"; PWD 'If [-E ' $bin/: /libexec/hadoop-config.sh "]; Then. "$bin"/.. /libexec/hadoop-config.shElse. "$bin/hadoop-config.sh"Fi"$bin"/hadoop-dae

, the file is conf/ Hdfs-site.xml, the parameter names are: Dfs.namenode.hosts and fs.namenode.hosts.exclude.Parameter action: dfs.hosts: Allow access to the list of Datanode machines, if not configured or the specified list file is empty, by default allows all hosts to become Datanode Dfs.hosts.exclude: Deny access to the list of machines for Datanode, If a machine appears in two lists at the same time, it is rejected. Their essential role is to deny Datanode process connections on some

Add, delete, and delete nodes in Hadoop. 1. Modify host as normal datanode. Add namenode ip2. modify namenode configuration file confslaves add ip or host3. on the machine of the new node, start the service [root @ slave-004hadoop] #. binhadoop-daemon.shstartdatanode [root @ slav Add, delete, and delete nodes in Hadoop

task will still be sent to them if they are normal.1, change the tasktracker-deny.list on master, add the corresponding machine 2. Refresh node configuration on master: Hadoop mradmin-refreshnodesAt this point in the Web UI, you can see that the number of nodes is reduced immediately. And the number of exclude nodes has been added. Be able to click in detail to

This article address: http://blog.csdn.net/kongxx/article/details/6892675 After installing the official documentation for Hadoop, run in pseudo distributed mode Bin/hadoop fs-put conf Input The following exception occurred 11/10/20 08:18:22 WARN HDFs. Dfsclient:datastreamer exception:org.apache.hadoop.ipc.remoteexception:java.io.ioexception:file/user/fkong/ Input/conf/slaves could only is replicated to 0

For example, if the ip address of the newly added node is 192.168.1.xxx, add the hosts of 192.168.1.xxxdatanode-xxx to all nn and dn nodes, create useraddhadoop-sbinbash-m on xxx, and add the ip address of another dn. all files in ssh are copied to homehadoop on xxx. install jdkapt-getinstallsun-java6-j in ssh path For example, if the ip address of the newly added node is 192.168.1.xxx, add the hosts of 192.168.1.xxx datanode-xxx to all nn and dn

Filter nodes inaccessible to Hadoop using Shell scripts The hp1 cluster recently used, because the maintenance staff of the cluster is not powerful, the node will always drop one or two after a while. Today, we found that HDFS is in protection mode when Hadoop is restarted. I decided to filter out all the inaccessible nodes