{"id":104486,"date":"2021-08-31T11:00:00","date_gmt":"2021-08-31T08:00:00","guid":{"rendered":"https:\/\/examples.javacodegeeks.com\/?p=104486"},"modified":"2021-08-30T12:49:55","modified_gmt":"2021-08-30T09:49:55","slug":"apache-hadoop-development-tools-eclipse-tutorial","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/apache-hadoop-development-tools-eclipse-tutorial\/","title":{"rendered":"Apache Hadoop Development Tools Eclipse Tutorial"},"content":{"rendered":"

<\/a>1. Introduction<\/h2>\n

This is an in-depth article related to the Apache Hadoop Development Tools Eclipse. Eclipse is used for developing java applications. Apache Hadoop is used for analyzing and storing big data. Developers use eclipse versions like Indigo, Juno, Kepler, Oxygen, and Photon. Hadoop Eclipse tools work well with eclipse above or equal to version 3.6. You can manage multiple versions of Hadoop from this IDE with plugins.<\/p>\n

\n

Table Of Contents<\/h3>\n
\n
1. Introduction<\/a><\/dt>\n
2. Apache Hadoop Development Tools Eclipse<\/a><\/dt>\n
\n
\n
2.1. Prerequisites<\/a><\/dt>\n
2.2. Download<\/a><\/dt>\n
2.3. Setup<\/a><\/dt>\n
2.4. How to download and install Eclipse<\/a><\/dt>\n
2.5. Hadoop Setup<\/a><\/dt>\n
2.6. Hadoop Tools<\/a><\/dt>\n<\/dl>\n<\/dd>\n
3.Download the Source Code<\/a><\/dt>\n<\/dl>\n<\/div>\n

 <\/p>\n

<\/a>2. Apache Hadoop Development Tools Eclipse<\/h2>\n

<\/a>2.1 Prerequisites<\/h3>\n

Java 7 or 8 is required on the linux, windows or mac operating system. Maven 3.6.1 is required for building the spring and hibernate application. Eclipse Oxygen can be used for this example. Apache Hadoop 2.6 can be downloaded from Hadoop Website<\/a>. <\/p>\n

<\/a>2.2 Download<\/h3>\n

You can download Java 8 can be downloaded from the Oracle website.\u00a0Apache Maven 3.6.1 can be downloaded from\u00a0Apache site<\/a>. Eclipse Oxygen can be downloaded from the\u00a0eclipse web site<\/a>. Apache Hadoop 2.6 can be downloaded from\u00a0Hadoop Website<\/a>.\u00a0 The Hadoop Eclipse plugin can be downloaded from this site<\/a>.<\/p>\n

<\/a>2.3 Setup<\/h3>\n

You can set the environment variables for JAVA_HOME and PATH. They can be set as shown below:<\/p>\n

Setup<\/em><\/span><\/p>\n

JAVA_HOME=\"\/desktop\/jdk1.8.0_73\"\nexport JAVA_HOME\nPATH=$JAVA_HOME\/bin:$PATH\nexport PATH\n<\/pre>\n
The environment variables for maven are set as below:<\/p>\n
Maven Environment<\/em><\/span><\/p>\n
JAVA_HOME=\u201d\/jboss\/jdk1.8.0_73\u2033\nexport M2_HOME=\/users\/bhagvan.kommadi\/Desktop\/apache-maven-3.6.1\nexport M2=$M2_HOME\/bin\nexport PATH=$M2:$PATH\n<\/pre>\n
<\/a>2.4 How to download and install  Eclipse<\/h3>\n
2.4.1 Eclipse Oxygen Setup<\/h4>\n
The \u2018eclipse-java-oxygen-2-macosx-cocoa-x86_64.tar\u2019 can be downloaded from the eclipse website. The tar file is opened by double click. The tar file is unzipped by using the archive utility. After unzipping, you will find the eclipse icon in the folder. You can move the eclipse icon from the folder to applications by dragging the icon.<\/p>\n
2.4.2 Launching IDE<\/h4>\n
Eclipse has features related to language support, customization, and extension. You can click on the eclipse icon to launch eclipse. The eclipse screen pops up as shown in the screenshot below:
 
<\/div> <\/div><\/p>\n
\n
\"Hadoop
Launching IDE<\/figcaption><\/figure>\n<\/div>\n
You can select the workspace from the screen which pops up. The attached image shows how it can be selected.<\/p>\n
\n
\"Hadoop
Eclipse Workspace<\/figcaption><\/figure>\n<\/div>\n
You can see the eclipse workbench on the screen. The attached screenshot shows the Eclipse project screen.<\/p>\n
\n
\"Hadoop
Eclipse Workbench<\/figcaption><\/figure>\n<\/div>\n
Java Hello World<\/code> class prints the greetings. The screenshot below is added to show the class and execution on the eclipse.<\/p>\n
\n
\"Hadoop
Java Hello<\/figcaption><\/figure>\n<\/div>\n
<\/a>2.5 Hadoop Setup<\/h3>\n
You need to configure HADOOP_HOME<\/code> as below:<\/p>\n
Hadoop Home<\/em><\/span><\/p>\n
export HADOOP_HOME=\/users\/bhagvan.kommadi\/desktop\/hadoop-2.6\/\n<\/pre>\n
You need to configure $HADOOP_HOME\/etc\/hadoop\/core-site.xml<\/code> as below:<\/p>\n
Core Site \u2013 Hadoop Configuration<\/em><\/span><\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?><?xml-stylesheet type=\"text\/xsl\" href=\"configuration.xsl\"?>\n<!--  Licensed under the Apache License, Version 2.0 (the \"License\");  you may not use this file except in compliance with the License.  You may obtain a copy of the License at     http:\/\/www.apache.org\/licenses\/LICENSE-2.0   Unless required by applicable law or agreed to in writing, software  distributed under the License is distributed on an \"AS IS\" BASIS,  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the specific language governing permissions and  limitations under the License. See accompanying LICENSE file.--> <!-- Put site-specific property overrides in this file. --> \n<configuration> \n<property> \n    <name>fs.defaultFS<\/name> \n<value>hdfs:\/\/apples-MacBook-Air.local:8020<\/value>\n<\/property>\n <\/configuration>\n<\/pre>\n
You need to start running Hadoop by using the command below :<\/p>\n
Hadoop Execution<\/em><\/span><\/p>\n
cd hadoop-2.6\/cd sbin.\/start-dfs.sh\n\n<\/pre>\n
The output of the commands is shown below :<\/p>\n
Hadoop Execution<\/em><\/span><\/p>\n
apples-MacBook-Air:sbin bhagvan.kommadi$ .\/start-dfs.sh20\/06\/29 20:26:23 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform\u2026 using builtin-java classes where applicableStarting namenodes on [apples-MacBook-Air.local]apples-MacBook-Air.local: Warning: Permanently added the ECDSA host key for IP address 'fe80::4e9:963f:5cc3:a000%en0' to the list of known hosts.Password:apples-MacBook-Air.local: starting namenode, logging to \/Users\/bhagvan.kommadi\/desktop\/hadoop-2.9.1\/logs\/hadoop-bhagvan.kommadi-namenode-apples-MacBook-Air.local.outPassword:localhost: starting datanode, logging to \/Users\/bhagvan.kommadi\/desktop\/hadoop-2.9.1\/logs\/hadoop-bhagvan.kommadi-datanode-apples-MacBook-Air.local.outStarting secondary namenodes [0.0.0.0]Password:0.0.0.0: starting secondarynamenode, logging to \/Users\/bhagvan.kommadi\/desktop\/hadoop-2.9.1\/logs\/hadoop-bhagvan.kommadi-secondarynamenode-apples-MacBook-Air.local.out20\/06\/29 20:27:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform\u2026 using builtin-java classes where applicable\n\n<\/pre>\n
<\/a>2.6 Hadoop Tools<\/h3>\n
Apache Hadoop Tools Eclipse has features related to map reduce projects, hadoop cluster configuration, hadoop wizards, wizards for mapper, reducer, driver, job listing, job execution, HDFS node inspection, Zoo keeper node inspection. Hadoop eclipse plugin jar file hadoop-eclipse-plugin-2.6.0.jar  can be placed at eclipse dropins\/plugins after creating the folder plugins under dropins. Eclipse needs to be started with clean option as shown in the command below:<\/p>\n
Eclipse Execution<\/em><\/span><\/p>\n
.\/eclipse -clean -vmargs -XstartOnFirstThread\n<\/pre>\n
Eclipse launches and you can select the workspace. You can select Windows -> Perspective-> Other. You can see the screenshot below where Map Reduce perspective is shown.<\/p>\n
\n
\"Hadoop<\/a>
Eclipse Perspective<\/figcaption><\/figure>\n<\/div>\n
Click on the Map reduce perspective and you can see the project as shown below:<\/p>\n
\n
\"\"<\/a>
Map reduce Project<\/figcaption><\/figure>\n<\/div>\n
You can create a new Mapreduce location as shown in the screenshot below:<\/p>\n
\n
\"\"<\/a>
Mapreduce location<\/figcaption><\/figure>\n<\/div>\n
You can set the hadoop location info in the UI as shown below:<\/p>\n
\"\"<\/a>
Hadoop Configuration<\/figcaption><\/figure>\n
You can create a new project or see other wizards by selecting New . The UI is shown below:<\/p>\n
\n
\"\"<\/a>
Hadoop Project<\/figcaption><\/figure>\n<\/div>\n
Click on New -> Other to see the different wizards as shown below:<\/p>\n
\n
\"\"<\/a>
Map reduce Wizards<\/figcaption><\/figure>\n<\/div>\n
<\/a>3. Download the Source Code<\/h2>\n
Download<\/strong>
\nYou can download the full source code of this example here: Apache Hadoop Development Tools Eclipse Tutorial<\/strong><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"
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