hadoop nodes

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[Nutch] Hadoop dynamically deletes Datanode nodes and Tasktracker 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

[Hadoop] problem record: hadoop startup error under root user: File/user/root/input/slaves cocould only be replicated to 0 nodes, in

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- # bin/hadoop FS-put conf Input11/08/03 09:58:33 warn HDFS. dfsclient: datastreamer exception: Org. apache. hadoop. IPC. remoteException: Java. io.

Troubleshooting Hadoop startup error: File/opt/hadoop/tmp/mapred/system/jobtracker.info could only being replicated to 0 nodes, instead of 1

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

Hadoop exception "cocould only be replicated to 0 nodes, instead of 1" solved

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,

Hadoop reports "cocould only be 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 cocould only be replicated to 0 nodes, instead of 1At org. Apache.

Installation and configuration of a fully distributed Hadoop cluster (4 nodes)

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

Hadoop fully distributed configuration (2 nodes)

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".

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

How to add secondarynamenode nodes in Hadoop

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

Hadoop dynamic Add/Remove nodes (Datanode and Tacktracker)

, 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 and delete nodes in Hadoop

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

Hadoop dynamic Join/delete nodes (Datanode and Tacktracker)

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

Hadoop "file/user/ <user> /input/conf/slaves could only is replicated to 0 nodes, instead of 1" problem and solution </user>

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

Introduce new DataNode nodes in the Hadoop Cluster

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

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

The importance of nodes in the Hadoop analysis diagram, solving the number of node triangles in the graph

Hadoop solves the importance of nodes in a non-pointing graph by solving the number of triangles in the node to show:It is important to solve the importance of the nodes in the graph, and to sort them in big data, distribute the data of large graph organization, find the important nodes, and make special treatment to t

"Big Data series" Hadoop upload file Error _copying_ could only is replicated to 0 nodes

Uploading files using Hadoop HDFs dfs-put XXX17/12/08 17:00:39 WARN HDFs. Dfsclient:datastreamer Exceptionorg.apache.hadoop.ipc.RemoteException (java.io.IOException): file/user/sanglp/ Hadoop-2.7.4.tar.gz._copying_ could only is replicated to 0 nodes instead of minreplication (=1). There is 0 Datanode (s) running and no node (s) is excluded in this operat

Work Diary: Hadoop client configuration needs to be consistent with cluster nodes

Yesterday because Datanode appeared large-scale offline situation, the preliminary judgment is dfs.datanode.max.transfer.threads parameter set too small. the hdfs-site.xml configuration files for all Datanode nodes are then adjusted. After restarting the cluster, in order to verify, try to run a job, see the configuration of the job in Jobhistory, it is surprising that the display is still the old value, that is, the job is still running with the old

Hadoop,hbase Adding and removing nodes

Hadoop Add and Remove nodes A Adding nodes (a) There are two ways to add a node, one is static add, close the Hadoop cluster, configure the appropriate configuration, restart the cluster (this will not be restated) (b) Dynamically added, adding nodes without restarting the c

Hadoop Tutorial (12) HDFs Add delete nodes and perform cluster balancing

HDFs Add Delete nodes and perform HDFs balance Mode 1: Static add Datanode, stop Namenode mode 1. Stop Namenode 2. Modify the slaves file and update to each node 3. Start Namenode 4. Execute the Hadoop balance command. (This is used for the balance cluster and is not required if you are just adding a node) ----------------------------------------- Mode 2: Dynamically add Datanode, keep Namenode way

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