sas hadoop configuration

[Copyright: The author of this article is original, reproduced please indicate the source]Article Source: http://www.cnblogs.com/sdksdk0/p/5585355.htmlJuppé Id:sdksdk0--------------------------------------------------In one of my previous blogs, I've shared the basic configuration of Hadoop, address: http://blog.csdn.net/sdksdk0/article/details/51498775, but that's used with beginners to learn and test, Tod

1, download hadoop-2.4.1.tar.gz from official website, my version is hadoop-2.4.1, can download in Http://pan.baidu.com/s/1cLAKCQ.2, decompression hadoop-2.4.1.tar.gz, using TAR-ZXVF hadoop-2.4.1.tar.gz-c app/, the app file is a file I created3, after decompression into the directory, CD/APP/

Ubuntu In the environment Eclipse the installation and Hadoop configuration of the pluginFirst, installation of EclipseIn Ubuntu desktop mode, click Ubuntu Software Center in the taskbar, search for Eclipse in the search barNote: The installation process requires the user password to be entered.Ii. Configuration of EclipseAfter Eclipse is installed, enter Whereis

64-bit Ubuntu configuration Hadoop needs to be compiled from the source code, although Ubuntu is installed in the virtual machine, can be loaded with a 32-bit, but now a little trouble to accumulate experience after the convenience. However, when writing this sentence, the compiled part is not finished yet. In any case, follow the usual habits and write as you go along:1.

First, install the JDK1. Download path: http://www.oracle.com/technetwork/java/javase/downloads/index.html2. Install to C:\Java\jdk1.8.0_121(do not install to the directory path with spaces, so Hadoop will not be found when looking for java_home)Second, configure the Java environment variables1,java_home : C:\Java\jdk1.8.0_1212,CLASSPATH : .; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar;3,path : Add %java_home%\bin;%java_home%\jre\bin; to the fron

function returns null when an error occurs in host parsing. This causes NullPointerException to be thrown when the host string is used later. The code assigned to the host is java.net. URI. Parser. parseHostname (int, int ). If you are interested, take a look. Comments are provided here for you to see.// Hostname = domainlabel [". "] | 1 * (domainlabel ". ") toplabel [". "] // domainlabel = alphanum | alphanum * (alphanum |"-") alphanum // toplabel = alpha | alpha * (alphanum | "-") alphanu //

value of an environment variable, and the value beyond this maximum number of layers will not be able to parseThen call the Configuration.main (null) method to execute the procedure as followsExecute firstStatic{...} Main load configuration file, AddResource () method adds resources for configurationIf it's an older version of Hadoop, load the configuration file

When installing the hadoop cluster today, all nodes are configured and the following commands are executed. Hadoop @ name-node :~ /Hadoop $ bin/hadoop FS-ls The Name node reports the following error: 11/04/02 17:16:12 Info Security. groups: group mapping impl = org. Apache. ha