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    <p>I installed eclipse plugin for hadoop-1.0.4 yesterday with difficulty, and tested it successful.</p> <p>The reason for plugin not working is that the jar package lost some libs :</p> <ul> <li>commons-cli-1.2.jar </li> <li>commons-configuration-1.6.jar </li> <li>jackson-core-asl-1.8.8.jar</li> <li>jackson-mapper-asl-1.8.8.jar </li> <li>commons-httpclient-3.0.1.jar </li> <li>commons-lang-2.4.jar</li> </ul> <p>you could cp this jars from <strong>${hadoop}/lib</strong> to <strong>${jar}/lib</strong>, and don't forget modifying <strong>MANIFEST</strong>.</p> <p>For convenience, I add some code to <strong>${eclipse-plugin-src}/build.xml</strong> target <strong>jar</strong></p> <pre><code>&lt;copy file="${hadoop.root}/build/ivy/lib/Hadoop/common/commons-cli-${commons-cli.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; &lt;copy file="${hadoop.root}/lib/commons-configuration-${commons-configuration.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; &lt;copy file="${hadoop.root}/lib/commons-httpclient-${commons-httpclient.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; &lt;copy file="${hadoop.root}/lib/commons-lang-${commons-lang.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; &lt;copy file="${hadoop.root}/lib/jackson-core-asl-${jackson.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; &lt;copy file="${hadoop.root}/lib/jackson-mapper-asl-${jackson.version}.jar" todir="${build.dir}/lib" verbose="true"/&gt; </code></pre> <p>and modified <strong>MANIFEST.MF</strong> in <strong>${eclipse-plugin-src}/META-INF</strong></p> <pre><code>undle-ClassPath: classes/, lib/hadoop-core.jar, lib/commons-cli-1.2.jar, lib/commons-configuration-1.6.jar, lib/jackson-core-asl-1.8.8.jar, lib/commons-httpclient-3.0.1.jar, lib/jackson-mapper-asl-1.8.8.jar, lib/commons-lang-2.4.jar </code></pre> <p>rebuild eclipse-plugin, and HAVE FUN!</p>
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    1. POInstalling Hadoop's Eclipse Plugin
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    1. POInstalling Hadoop's Eclipse Plugin
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    1. COThanks Chris. You are a life saver. Just one other question; I took your earlier advice and started creating Hadoop projects through maven which means I won't need Eclipse plugin for such projects. Do you think I should just stop using Eclipse plugin? I think the difficulties that come up with Hadoop's Eclipse plugin makes it somewhat of a liability. Do you agree?
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    2. COHadoop's Eclipse plugin supply eclipse debug support for hadoop map/reduce and hdfs application, give a GUI to connect hdfs and jobtracker
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    3. COI have followed your methods and built the plugin with command "ant jar", but I got noting. Can you express your method in more detail? Thanks! @hs3180
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