hadoop 50070

:50030 (Web page for MapReduce)http://localhost:50070 (HDFS Web page)Validation examples: Web page for MapReduceWeb pages for HDFsproblems encountered:1. When starting Hadoop, always say Java_home is not configuredWhen I use the shell command in the tutorial to execute bin/start-all.sh in the Hadoop folder, I always report java_home is not set.But I also set the

hadoop-x.x.xUnzip to the specified folder. Like/home/u.(2) configuration information for changing configuration files# vim ~/hadoop-1.2.1/conf/core-site.xml# vim ~/hadoop-1.2.1/conf/hdfs-site.xml# vim ~/hadoop-1.2.1/conf/mapred-site.xml(3) # ~/hadoop-1.2.1/bin/

gadget JPS.Note: The top two pictures show success!? View cluster status with "Hadoop Dfsadmin-report" ? Viewing a cluster from a Web page Visit jobtracker:http://192.168.1.127:50030?Visit namenode:http://192.168.1.127:50070 The problems encountered and the solving methods About Warning: $HADOOP _home is deprecated

(LOCALSRC)); Configuration conf = new configuration (); FileSystem fs = Filesystem.get (Uri.create (DST), conf); OutputStream out = fs.create (new Path (DST), new progressable () {public void progress () {System.out.print ("."); } }); Ioutils.copybytes (in, out, 4096, true); SYSTEM.OUT.PRINTLN ("Success");} catch (Exception e) {//TODO auto-generated CATch blocke.printstacktrace ();}}} Then execute the program, assuming that the upload succeeds in the output success under the console.Yo

Under the Cd/home/hadoop/hadoop-2.5.2/binPerformed by the./hdfs Namenode-formatError[Email protected] bin]$/hdfs Namenode–format16/07/11 09:21:21 INFO Namenode. Namenode:startup_msg:/************************************************************Startup_msg:starting NameNodeStartup_msg:host = node1/192.168.8.11Startup_msg:args = [–format]Startup_msg:version = 2.5.2startup_msg: classpath =/usr/

, verify that Hadoop is successfully installed. Open your browser and enter the URL: Http: // localhost: 50070/(HDFS Web page) Http: // localhost: 50030/(MapReduce Web page) If you can see it, it indicates that Hadoop has been installed successfully. For Hadoop, the installation of MapReduce and HDFS is required. Howev

change!): 10969 DataNode11745 NodeManager11292 SecondaryNameNode10708 NameNode11483 ResourceManager13096 Jps n.b. The old jobtracker have been replaced by the ResourceManager. Access Web interfaces: Cluster status:http://localhost:8088 HDFS status:http://localhost:50070 Secondary NameNode status:http://localhost:50090 Test Hadoop:hadoop jar ~/hadoop/share/

. Configuring Masters and slaves FilesAccording to the actual situation to configure the hostname of the Masters, in this experiment, the host name of the Masters main node is master,Then fill in the Masters file:In the same vein, fill in the Slaves file:Viii. replicate to each node HadoopTo replicate Hadoop to the Node1 node:To replicate Hadoop to the Node2 node:In this way, the node Node1 and node Node2 a

to /usr/hadoop-1.1.1/libexec /.. /logs/hadoop-root-datanode- localhost. localdomain. outlocalhost: Starting secondarynamenode, logging to /usr/hadoop-1.1.1/libexec /.. /logs/hadoop-root-secondarynamenode- localhost. localdomain. outstarting jobtracker, logging to /usr/hadoop