hadoop nodes

I encountered some problems in learning hadoop over the past two weeks. Today's question is how to restore the deleted datanode At that time, because refreshNodes was not executed, the datanode was not started successfully. The following error is reported: ERROR org. apache. hadoop. hdfs. server. datanode. DataNode: org. apache. hadoop. ipc. RemoteException:

Address: http://blog.csdn.net/kongxx/article/details/6896230 Assume that a hadoop cluster environment has been created and two slave nodes fkongnix1 and fkongnix2 are available. Here, a new node fkongnix3. For how to build a hadoop distributed environment, referDistributed mode of hadoop Learning 1. Modify the $

The existing computing power in the cluster is insufficient, and when additional nodes are added, a new node can be dynamically added using the following method: 1, install the Hadoop program on the new node, be sure to control the version, can be from the cluster of other machines CP a modified also line 2. Copy the relevant configuration file of Namenode to this node 3, modify masters and slavers files

Recently used a cluster HP1, because the maintenance of the cluster of people do not give force, the node always over a period of time dropped one or two. When Hadoop was restarted today, HDFs was in protected mode.decided to filter out all the inaccessible nodes in the slaves node, so I wrote a small script, which is recorded here, and it is convenient to use it directly.PS: Written in C shellThe code is a

ProblemUpload file to Hadoop exception, error message is as follows:org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /home/input/qn_log.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.Solve1. View the process of the problem node:Datanode process does not start2. View

Software: CentOS-7 VMware12 sshsecureshellclientShell tool: XshellVM Network Configuration01. Basic Configuration02.SSH Configuration03.zookeeper Configuration04.hadoop Configuration05.mysql Configuration _ single node06.hbase Configuration07.hive Configuration08.kafka Configuration09.flume Configuration10.spark Configuration11.storm Configuration12.RABBITMQ Configuration13.MONGODB Configuration14.redis Configuration15.elk Configuration16.sqoop Config

Today, when we set up the hadoop environment configuration, We need to log on via SSH without a password. It took a lot of effort and finally got it done. First, different Linux operating systems may have slightly different commands. my operating system is Ubuntu, So I recorded what I did. 1. hadoop02 @ ubuntuserver2:/root $ ssh-keygen-t rsa command. When the result is displayed, I press enter until the end, Generating public/private RSA key pair. 2.

the Hadoop middleware series which opened the zookeeper this default port to occupy.Not sure, so it's not good to kill this port, so you can only modify the default port:Modify in hbase-site.xmlMake 2181 into 2182 Post-execution resultsInformation display [Root@master bin]#/start-hbase.sh starting master, logging To/home/hbase/logs/hbase-root-master-master.out Java HotSpot (TM) 64-bit Server VM warning:ignoring option permsize=128m; support is rem

=yeshostname=node1# you need to configure the Windows file to be uploaded to the virtual machine # C:\WINDOWS\SYSTEM32\DRIVERS\ETC Add the corresponding IP and machine name in the host file 192.168.6.131 node1192.168.6.132 node2192.168.6.133 node3 shutdown-h now# Snapshot initialization # clone Node2 Node3# ==================================================================node2vi/etc/hostnamenode2vi/etc/sysconfig/networknetworking=yeshostname=node2vi/etc/sysconfig/network-scripts/ ifcfg-ens33# b

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Install times wrong: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (site) on project Hadoop-hdfs:an Ant B Uildexception has occured:input file/usr/local/hadoop-2.6.0-stable/hadoop-2.6.0-src/hadoop-hdfs-project/ Hadoop-hdfs/target/findbugsxml.xml

the individual operations on each server, Because each of these operations can be a huge project. Installation Steps 1. Download Hadoop and JDK: http://mirror.bit.edu.cn/apache/hadoop/common/ such as: hadoop-0.22.0 2. Configure DNS resolution host name Note: In the production of Hadoop cluster environment, because

Problem: The storage data in the cluster increases, so that the datanode space is almost full (previously DFS. Data. dir =/data/HDFS/dfs/data), and the hard disk monitoring of the machineProgramNon-stop alarm. A storage hard disk is doubled for

This article is reproduced from http://www.cnblogs.com/serendipity/archive/2012/04/17/2453428.html, where we thank bloggers for sharing. Problem: The storage data in the cluster increases, causing the datanode space to fill up (formerly

One, using nodes to implement the linked list LinkedList, without changing the JAVAAPI set frameImport Java.util.scanner;public class Main {public static class Node {int data; Node Next=null; public Node (int data) {this.data=data;}; } public static class Mylinkedlist {Node head=null; Public mylinkedlist () {}//Add node public void AddNode (int d) {node newnode=new node (d); if (head==null) {head=newnode; return; } Node Tmp=h

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)Configuration: After hadoop is started, namenode starts and stops various daemon on each datanode through SSH (Secure Shell, this requires that you do not need to enter a password when executing commands between nodes. Therefore, we need to configure SSH to use the password-free public key authentication form.Take the three machines in this article as an example. Now node1 is the master node, and it need

) Script> BODY> HTML> Analyze the result of the run with the values of the three properties:Nodetype:element_nodeNodeType Value: 1NodeName: Element tag name//here is TDNodevalue:null2: Attribute nodeAttribute Node code HTML> HEAD> title> Empty Valley leisurely title> HEAD> BODY> table> tr> TD Id="John" name="myname">johntd> TD>doetd> TD Id="Jack">jacktd> tr> Table> script> var d = document.getElementById ("John"). GetAttr