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{width:100%;height:auto;margin-right:0px;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:#ccced1;float:left;}ul.nav-buttons li a {display:block;width:100%;}ul.nav-buttons li a.dropdown {padding-left:36px !important;background-color:#ebeced; background-repeat:no-repeat;background-position:0px center;background-size:40px;-moz-background-size:40px;}ul.nav-buttons ul {position:relative;left:0px;}ul.nav-buttons ul li {border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:#fff;}}@media screen and (-webkit-min-device-pixel-ratio:1.5),screen and (-moz-min-device-pixel-ratio:1.5),screen and (min-device-pixel-ratio:1.5) { .navclosed { background-repeat:no-repeat;background-position:left top;background-size:50px;-moz-background-size:50px;}.navclicked { background-repeat:no-repeat;background-position:left -50px;background-size:50px;-moz-background-size:50px;}ul.nav-buttons li a.dropdown,ul.nav-buttons li a.dropdown:hover,ul.nav-buttons li:hover a.dropdown{ 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width="145" height="30"></a></div><div class="searchs searchs-def"><form action="https://idroot.us" id="searchform" method="GET" target="_top"><input type="text" placeholder="Search..." id="s" name="s" class="field"><button type="submit" value="Search" class="fa fa-search btn"></button></form></div><div on="tap:resmenu.toggle" role="button" tabindex="1" class="resmenu"><i class="fa fa-bars" aria-hidden="true"></i></div><nav><ul id="dropdownmenu" class="nav-buttons"><li id="menu-item-5663" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5663"><a href="https://idroot.us/linux/ubuntu/"><i class="fa fa-linux"></i>Ubuntu</a></li><li id="menu-item-5664" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5664"><a href="https://idroot.us/linux/centos/"><i class="fa fa-linux"></i>Centos</a></li><li id="menu-item-5665" class="menu-item menu-item-type-taxonomy menu-item-object-category current-post-ancestor current-menu-parent current-post-parent menu-item-5665"><a href="https://idroot.us/linux/debian/"><i class="fa fa-linux"></i>Debian</a></li><li id="menu-item-6844" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-6844"><a href="https://idroot.us/linux/linux-mint/"><i class="fa fa-linux"></i>Linux Mint</a></li></ul></nav></header><div class="contents"><div class="content"><div class="posts"><main class="post-single"><nav class="breadcrumb"><ul vocab="http://schema.org/" typeof="BreadcrumbList"><li property="itemListElement" typeof="ListItem" class="breadhome"><a href="https://idroot.us" property="item" typeof="WebPage"><span property="name">Home</span><meta property="position" content="1"></a></li><li property="itemListElement" typeof="ListItem"><a href="https://idroot.us/linux/debian/" property="item" typeof="WebPage"><span property="name">Debian</span><meta property="position" content="2"></a></li><li>How To Install Apache Hadoop on Debian 9 Stretch</li></ul></nav><article><h1 class="single-title">How To Install Apache Hadoop on Debian 9 Stretch</h1><div class="post-meta"><span class="post-meta-cat"><i class="fa fa-tag" aria-hidden="true"></i><a href="https://idroot.us/linux/debian/" rel="category tag">Debian</a>, <a href="https://idroot.us/linux/" rel="category tag">Linux</a>, <a href="https://idroot.us/tutorials/" rel="category tag">Tutorials</a></span><span class="post-meta-date"><time class="entry-date published updated" datetime="2018-11-20T08:11:29+00:00"><i class="fa fa-calendar" aria-hidden="true"></i>November 20, 2018 08:11</time></span></div><div class="entry-content"><p style="text-align:center;"><img class="aligncenter wp-image-1035 size-full" title="Install Apache Hadoop on Debian 9 Stretch" src="https://idroot.us/wp-content/uploads/2015/06/Apache-Hadoop-logo.jpg" alt="Install Apache Hadoop on Debian 9 Stretch" width="257" height="206"/></p><p style="text-align:justify;">In this tutorial we will show you how to install Apache Hadoop on Debian 9. For those of you who didn’t know, Apache Hadoop is an open source framework used for distributed storage as well as distributed processing of big data on clusters of computers which runs on commodity hardwares. Hadoop stores data in Hadoop Distributed File System (HDFS) and the processing of these data is done using MapReduce. YARN provides an API for requesting and allocating resources in the Hadoop cluster.</p><p style="text-align:justify;">This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Apache Hadoop on a Debian 9 (Stretch) server.</p><h2>Install Apache Hadoop on Debian 9 Stretch</h2><p>Step 1. Before we install any software, it’s important to make sure your system is up to date by running these following apt-get commands in the terminal:</p><div id="crayon-5f1c199deb70c923921533" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">apt-get update
- apt-get upgrade</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb70c923921533-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb70c923921533-2">2</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb70c923921533-1"><span class="crayon-v">apt</span><span class="crayon-o">-</span><span class="crayon-e">get</span><span class="crayon-e">update</span></div><div class="crayon-line" id="crayon-5f1c199deb70c923921533-2"><span class="crayon-v">apt</span><span class="crayon-o">-</span><span class="crayon-e">get</span><span class="crayon-v">upgrade</span></div></div></td></tr></table></div></div><p>Step 2. Installing Java (OpenJDK).</p><p style="padding-left:30px;text-align:justify;">Apache Hadoop requires Java version 8 and above. So, you can choose to install either OpenJDK or Oracle JDK:</p><ul><li><a href="https://idroot.us/tutorials/install-java-debian-9-stretch/" target="_blank" rel="noopener">Install Java JDK 8 on Debian</a>:</li></ul><div id="crayon-5f1c199deb714868233881" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">root@idroot.us ~# java -version
- java version "1.8.0_192"
- Java(TM) SE Runtime Environment (build 1.8.0_192-b02)
- Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb714868233881-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb714868233881-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb714868233881-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb714868233881-4">4</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb714868233881-1"><span class="crayon-v">root</span><span class="crayon-sy">@</span><span class="crayon-v">idroot</span><span class="crayon-sy">.</span><span class="crayon-v">us</span><span class="crayon-h"></span><span class="crayon-o">~</span><span class="crayon-p"># java -version</span></div><div class="crayon-line" id="crayon-5f1c199deb714868233881-2"><span class="crayon-e">java</span><span class="crayon-i">version</span><span class="crayon-h"></span><span class="crayon-s">"1.8.0_192"</span></div><div class="crayon-line" id="crayon-5f1c199deb714868233881-3"><span class="crayon-e">Java</span><span class="crayon-sy">(</span><span class="crayon-v">TM</span><span class="crayon-sy">)</span><span class="crayon-h"></span><span class="crayon-e">SE</span><span class="crayon-e">Runtime</span><span class="crayon-e">Environment</span><span class="crayon-h"></span><span class="crayon-sy">(</span><span class="crayon-i">build</span><span class="crayon-h"></span><span class="crayon-cn">1.8.0_192</span><span class="crayon-o">-</span><span class="crayon-v">b02</span><span class="crayon-sy">)</span></div><div class="crayon-line" id="crayon-5f1c199deb714868233881-4"><span class="crayon-e">Java</span><span class="crayon-e">HotSpot</span><span class="crayon-sy">(</span><span class="crayon-v">TM</span><span class="crayon-sy">)</span><span class="crayon-h"></span><span class="crayon-cn">64</span><span class="crayon-o">-</span><span class="crayon-e">Bit</span><span class="crayon-e">Server</span><span class="crayon-e">VM</span><span class="crayon-h"></span><span class="crayon-sy">(</span><span class="crayon-i">build</span><span class="crayon-h"></span><span class="crayon-cn">25.74</span><span class="crayon-o">-</span><span class="crayon-v">b02</span><span class="crayon-sy">,</span><span class="crayon-h"></span><span class="crayon-e">mixed</span><span class="crayon-v">mode</span><span class="crayon-sy">)</span></div></div></td></tr></table></div></div>
- Step 3. Installing Apache Hadoop on Debian 9.</p><p style="padding-left:30px;text-align:justify;">To avoid security issues, we recommend to setup new Hadoop user group and user account to deal with all Hadoop related activities, following command:</p><div id="crayon-5f1c199deb715485487141" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">sudo addgroup hadoopgroup
- sudo adduser —ingroup hadoopgroup hadoopuser</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb715485487141-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb715485487141-2">2</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb715485487141-1"><span class="crayon-e">sudo</span><span class="crayon-e">addgroup</span><span class="crayon-e">hadoopgroup</span></div><div class="crayon-line" id="crayon-5f1c199deb715485487141-2"><span class="crayon-e">sudo</span><span class="crayon-i">adduser</span><span class="crayon-h"></span>—<span class="crayon-e">ingroup</span><span class="crayon-e">hadoopgroup</span><span class="crayon-v">hadoopuser</span></div></div></td></tr></table></div></div><p style="padding-left:30px;text-align:justify;">After creating the user, it also required to set up key based ssh on its own account. To do this use execute following commands:</p><div id="crayon-5f1c199deb717023321254" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">su - hadoopuser
- ssh-keygen -t rsa -P ""
- cat /home/hadoopuser/.ssh/id_rsa.pub >> /home/hadoopuser/.ssh/authorized_keys
- chmod 600 authorized_keys
- ssh-copy-id -i ~/.ssh/id_rsa.pub slave-1
- ssh slave-1</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb717023321254-6">6</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb717023321254-1"><span class="crayon-v">su</span><span class="crayon-h"></span><span class="crayon-o">-</span><span class="crayon-h"></span><span class="crayon-e">hadoopuser</span></div><div class="crayon-line" id="crayon-5f1c199deb717023321254-2"><span class="crayon-v">ssh</span><span class="crayon-o">-</span><span class="crayon-v">keygen</span><span class="crayon-h"></span><span class="crayon-o">-</span><span class="crayon-i">t</span><span class="crayon-h"></span><span class="crayon-v">rsa</span><span class="crayon-h"></span><span class="crayon-o">-</span><span class="crayon-i">P</span><span class="crayon-h"></span><span class="crayon-s">""</span></div><div class="crayon-line" id="crayon-5f1c199deb717023321254-3"><span class="crayon-v">cat</span><span class="crayon-h"></span><span class="crayon-o">/</span><span class="crayon-v">home</span><span class="crayon-o">/</span><span class="crayon-v">hadoopuser</span><span class="crayon-o">/</span><span class="crayon-sy">.</span><span class="crayon-v">ssh</span><span class="crayon-o">/</span><span class="crayon-v">id_rsa</span><span class="crayon-sy">.</span><span class="crayon-v">pub</span><span class="crayon-h"></span><span class="crayon-o">>></span><span class="crayon-h"></span><span class="crayon-o">/</span><span class="crayon-v">home</span><span class="crayon-o">/</span><span class="crayon-v">hadoopuser</span><span class="crayon-o">/</span><span class="crayon-sy">.</span><span class="crayon-v">ssh</span><span class="crayon-o">/</span><span class="crayon-e">authorized_keys</span></div><div class="crayon-line" id="crayon-5f1c199deb717023321254-4"><span class="crayon-i">chmod</span><span class="crayon-h"></span><span class="crayon-cn">600</span><span class="crayon-h"></span><span class="crayon-e">authorized_keys</span></div><div class="crayon-line" id="crayon-5f1c199deb717023321254-5"><span class="crayon-v">ssh</span><span class="crayon-o">-</span><span class="crayon-v">copy</span><span class="crayon-o">-</span><span class="crayon-v">id</span><span class="crayon-h"></span><span class="crayon-o">-</span><span class="crayon-v">i</span><span class="crayon-h"></span><span class="crayon-o">~</span><span class="crayon-o">/</span><span class="crayon-sy">.</span><span class="crayon-v">ssh</span><span class="crayon-o">/</span><span class="crayon-v">id_rsa</span><span class="crayon-sy">.</span><span class="crayon-e">pub</span><span class="crayon-v">slave</span><span class="crayon-o">-</span><span class="crayon-cn">1</span></div><div class="crayon-line" id="crayon-5f1c199deb717023321254-6"><span class="crayon-e">ssh</span><span class="crayon-v">slave</span><span class="crayon-o">-</span><span class="crayon-cn">1</span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Next, download the <a href="http://www-us.apache.org/dist/hadoop/common/" target="_blank" rel="noopener">latest stable version of Apache Hadoop</a>, At the moment of writing this article it is version 2.8.1:</p><div id="crayon-5f1c199deb718874048009" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">wget http://www-us.apache.org/dist/hadoop/common/hadoop-3.1.1/hadoop-3.1.1.tar.gz
- tar xzf hadoop-3.1.1.tar.gz
- mv hadoop-3.1.1 hadoop</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb718874048009-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb718874048009-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb718874048009-3">3</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb718874048009-1"><span class="crayon-e">wget</span><span class="crayon-v">http</span><span class="crayon-o">:</span><span class="crayon-c">//www-us.apache.org/dist/hadoop/common/hadoop-3.1.1/hadoop-3.1.1.tar.gz</span></div><div class="crayon-line" id="crayon-5f1c199deb718874048009-2"><span class="crayon-e">tar</span><span class="crayon-e">xzf</span><span class="crayon-v">hadoop</span><span class="crayon-o">-</span><span class="crayon-cn">3.1.1.tar.gz</span></div><div class="crayon-line" id="crayon-5f1c199deb718874048009-3"><span class="crayon-e">mv</span><span class="crayon-v">hadoop</span><span class="crayon-o">-</span><span class="crayon-cn">3.1.1</span><span class="crayon-h"></span><span class="crayon-v">hadoop</span></div></div></td></tr></table></div></div>
- Step 4. Setup Environment Apache Hadoop.</p><p style="padding-left:30px;">Setting up the environment variables. Edit ~/.bashrc file and append following values at end of file:</p><div id="crayon-5f1c199deb71a103500045" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">export HADOOP_HOME=/home/hadoop/hadoop
- export HADOOP_INSTALL=$HADOOP_HOME
- export HADOOP_MAPRED_HOME=$HADOOP_HOME
- export HADOOP_COMMON_HOME=$HADOOP_HOME
- export HADOOP_HDFS_HOME=$HADOOP_HOME
- export YARN_HOME=$HADOOP_HOME
- export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
- export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-6">6</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-7">7</div><div class="crayon-num" data-line="crayon-5f1c199deb71a103500045-8">8</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb71a103500045-1"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">=</span><span class="crayon-o">/</span><span class="crayon-v">home</span><span class="crayon-o">/</span><span class="crayon-v">hadoop</span><span class="crayon-o">/</span><span class="crayon-e">hadoop</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-2"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_INSTALL</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-e">HADOOP_HOME</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-3"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_MAPRED_HOME</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-e">HADOOP_HOME</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-4"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_COMMON_HOME</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-e">HADOOP_HOME</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-5"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_HDFS_HOME</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-e">HADOOP_HOME</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-6"><span class="crayon-e">export</span><span class="crayon-v">YARN_HOME</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-e">HADOOP_HOME</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-7"><span class="crayon-e">export</span><span class="crayon-v">HADOOP_COMMON_LIB_NATIVE_DIR</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">/</span><span class="crayon-v">lib</span><span class="crayon-o">/</span><span class="crayon-m">native</span></div><div class="crayon-line" id="crayon-5f1c199deb71a103500045-8"><span class="crayon-e">export</span><span class="crayon-v">PATH</span><span class="crayon-o">=</span><span class="crayon-sy">$</span><span class="crayon-v">PATH</span><span class="crayon-o">:</span><span class="crayon-sy">$</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">/</span><span class="crayon-v">sbin</span><span class="crayon-o">:</span><span class="crayon-sy">$</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">/</span><span class="crayon-v">bin</span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Apply environmental variables to current running session:</p><div id="crayon-5f1c199deb71b678605668" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">source ~/.bashrc</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb71b678605668-1">1</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb71b678605668-1"><span class="crayon-v">source</span><span class="crayon-h"></span><span class="crayon-o">~</span><span class="crayon-o">/</span><span class="crayon-sy">.</span><span class="crayon-v">bashrc</span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Now edit $HADOOP_HOME/etc/hadoop/hadoop-env.sh file and set JAVA_HOME environment variable:</p><div id="crayon-5f1c199deb71c020291608" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">export JAVA_HOME=/usr/jdk1.8.0_192/</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb71c020291608-1">1</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb71c020291608-1"><span class="crayon-e">export</span><span class="crayon-v">JAVA_HOME</span><span class="crayon-o">=</span><span class="crayon-o">/</span><span class="crayon-v">usr</span><span class="crayon-o">/</span><span class="crayon-v">jdk1</span><span class="crayon-sy">.</span><span class="crayon-cn">8.0_192</span><span class="crayon-o">/</span></div></div></td></tr></table></div></div><p style="padding-left:30px;text-align:justify;">Hadoop has many of configuration files, which need to configure as per requirements of your hadoop infrastructure. Let’s start with the configuration with basic Hadoop single node cluster setup:</p><div id="crayon-5f1c199deb71d229421487" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">cd $HADOOP_HOME/etc/hadoop</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb71d229421487-1">1</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb71d229421487-1"><span class="crayon-i">cd</span><span class="crayon-h"></span><span class="crayon-sy">$</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">/</span><span class="crayon-v">etc</span><span class="crayon-o">/</span><span class="crayon-v">hadoop</span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Edit core-site.xml:</p><div id="crayon-5f1c199deb71f853683483" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;"><configuration>
- <property>
- <name>fs.default.name</name>
- <value>hdfs://localhost:9000</value>
- </property>
- </configuration></textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb71f853683483-6">6</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb71f853683483-1"><span class="crayon-o"><</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb71f853683483-2"><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb71f853683483-3"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">fs</span><span class="crayon-sy">.</span><span class="crayon-st">default</span><span class="crayon-sy">.</span><span class="crayon-v">name</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb71f853683483-4"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-v">hdfs</span><span class="crayon-o">:</span><span class="crayon-c">//localhost:9000</value></span></div><div class="crayon-line" id="crayon-5f1c199deb71f853683483-5"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb71f853683483-6"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Edit hdfs-site.xml:</p><div id="crayon-5f1c199deb720787745297" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;"><configuration>
- <property>
- <name>dfs.replication</name>
- <value>1</value>
- </property>
- <property>
- <name>dfs.name.dir</name>
- <value>file:///home/hadoop/hadoopdata/hdfs/namenode</value>
- </property>
- <property>
- <name>dfs.data.dir</name>
- <value>file:///home/hadoop/hadoopdata/hdfs/datanode</value>
- </property>
- </configuration></textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-6">6</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-7">7</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-8">8</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-9">9</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-10">10</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-11">11</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-12">12</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-13">13</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-14">14</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-15">15</div><div class="crayon-num" data-line="crayon-5f1c199deb720787745297-16">16</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb720787745297-1"><span class="crayon-o"><</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-2"><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-3"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">dfs</span><span class="crayon-sy">.</span><span class="crayon-v">replication</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-4"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-cn">1</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">value</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-5"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-6"> </div><div class="crayon-line" id="crayon-5f1c199deb720787745297-7"><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-8"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">dfs</span><span class="crayon-sy">.</span><span class="crayon-v">name</span><span class="crayon-sy">.</span><span class="crayon-v">dir</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-9"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-v">file</span><span class="crayon-o">:</span><span class="crayon-c">///home/hadoop/hadoopdata/hdfs/namenode</value></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-10"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-11"> </div><div class="crayon-line" id="crayon-5f1c199deb720787745297-12"><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-13"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">dfs</span><span class="crayon-sy">.</span><span class="crayon-v">data</span><span class="crayon-sy">.</span><span class="crayon-v">dir</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-14"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-v">file</span><span class="crayon-o">:</span><span class="crayon-c">///home/hadoop/hadoopdata/hdfs/datanode</value></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-15"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb720787745297-16"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Edit mapred-site.xml:</p><div id="crayon-5f1c199deb721827021545" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;"><configuration>
- <property>
- <name>mapreduce.framework.name</name>
- <value>yarn</value>
- </property>
- </configuration></textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb721827021545-6">6</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb721827021545-1"><span class="crayon-o"><</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb721827021545-2"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb721827021545-3"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">mapreduce</span><span class="crayon-sy">.</span><span class="crayon-v">framework</span><span class="crayon-sy">.</span><span class="crayon-v">name</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb721827021545-4"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-v">yarn</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">value</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb721827021545-5"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb721827021545-6"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Edit yarn-site.xml:</p><div id="crayon-5f1c199deb722921012838" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;"><configuration>
- <property>
- <name>yarn.nodemanager.aux-services</name>
- <value>mapreduce_shuffle</value>
- </property>
- </configuration></textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-3">3</div><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-4">4</div><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-5">5</div><div class="crayon-num" data-line="crayon-5f1c199deb722921012838-6">6</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb722921012838-1"><span class="crayon-o"><</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb722921012838-2"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb722921012838-3"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">name</span><span class="crayon-o">></span><span class="crayon-v">yarn</span><span class="crayon-sy">.</span><span class="crayon-v">nodemanager</span><span class="crayon-sy">.</span><span class="crayon-v">aux</span><span class="crayon-o">-</span><span class="crayon-v">services</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">name</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb722921012838-4"><span class="crayon-h"> </span><span class="crayon-o"><</span><span class="crayon-v">value</span><span class="crayon-o">></span><span class="crayon-v">mapreduce_shuffle</span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">value</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb722921012838-5"><span class="crayon-h"></span><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-m">property</span><span class="crayon-o">></span></div><div class="crayon-line" id="crayon-5f1c199deb722921012838-6"><span class="crayon-o"><</span><span class="crayon-o">/</span><span class="crayon-v">configuration</span><span class="crayon-o">></span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Now format namenode using the following command, do not forget to check the storage directory:</p><div id="crayon-5f1c199deb723342937834" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">hdfs namenode -format</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb723342937834-1">1</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb723342937834-1"><span class="crayon-e">hdfs</span><span class="crayon-v">namenode</span><span class="crayon-h"></span><span class="crayon-o">-</span><span class="crayon-v">format</span></div></div></td></tr></table></div></div><p style="padding-left:30px;">Start all hadoop services use the following command:</p><div id="crayon-5f1c199deb724580915268" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">cd $HADOOP_HOME/sbin/
- start-dfs.sh
- start-yarn.sh</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb724580915268-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb724580915268-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb724580915268-3">3</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb724580915268-1"><span class="crayon-i">cd</span><span class="crayon-h"></span><span class="crayon-sy">$</span><span class="crayon-v">HADOOP_HOME</span><span class="crayon-o">/</span><span class="crayon-v">sbin</span><span class="crayon-o">/</span></div><div class="crayon-line" id="crayon-5f1c199deb724580915268-2"><span class="crayon-v">start</span><span class="crayon-o">-</span><span class="crayon-v">dfs</span><span class="crayon-sy">.</span><span class="crayon-e">sh</span></div><div class="crayon-line" id="crayon-5f1c199deb724580915268-3"><span class="crayon-v">start</span><span class="crayon-o">-</span><span class="crayon-v">yarn</span><span class="crayon-sy">.</span><span class="crayon-v">sh</span></div></div></td></tr></table></div></div><p style="padding-left:30px;text-align:justify;">You should observe the output to ascertain that it tries to start datanode on slave nodes one by one. To check if all services are started well using ‘jps‘ command:</p><div id="crayon-5f1c199deb725368839764" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">jps</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb725368839764-1">1</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb725368839764-1"><span class="crayon-v">jps</span></div></div></td></tr></table></div></div>
- Step 5. Setup Firewall for Apache Hadoop.</p><p style="padding-left:30px;">Allow Apache Hadoop through the firewall:</p><div id="crayon-5f1c199deb727036747381" class="crayon-syntax crayon-theme-github crayon-font-droid-sans-mono crayon-os-pc print-yes notranslate" data-settings=" no-popup minimize scroll-mouseover disable-anim" style="margin-top:12px;margin-bottom:12px;font-size:12px!important;line-height:15px!important;"><div class="crayon-plain-wrap"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick show-plain-default" readonly style="-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;font-size:12px!important;line-height:15px!important;">ufw allow 50070/tcp
- ufw allow 8088/tcp
- ufw reload</textarea></div><div class="crayon-main" style=""><table class="crayon-table"><tr class="crayon-row"><td class="crayon-nums " data-settings="hide"><div class="crayon-nums-content" style="font-size:12px!important;line-height:15px!important;"><div class="crayon-num" data-line="crayon-5f1c199deb727036747381-1">1</div><div class="crayon-num" data-line="crayon-5f1c199deb727036747381-2">2</div><div class="crayon-num" data-line="crayon-5f1c199deb727036747381-3">3</div></div></td><td class="crayon-code"><div class="crayon-pre" style="font-size:12px!important;line-height:15px!important;-moz-tab-size:4;-o-tab-size:4;-webkit-tab-size:4;tab-size:4;"><div class="crayon-line" id="crayon-5f1c199deb727036747381-1"><span class="crayon-e">ufw</span><span class="crayon-i">allow</span><span class="crayon-h"></span><span class="crayon-cn">50070</span><span class="crayon-o">/</span><span class="crayon-e">tcp</span></div><div class="crayon-line" id="crayon-5f1c199deb727036747381-2"><span class="crayon-e">ufw</span><span class="crayon-i">allow</span><span class="crayon-h"></span><span class="crayon-cn">8088</span><span class="crayon-o">/</span><span class="crayon-e">tcp</span></div><div class="crayon-line" id="crayon-5f1c199deb727036747381-3"><span class="crayon-e">ufw</span><span class="crayon-v">reload</span></div></div></td></tr></table></div></div>
- Step 6. Accessing Apache Hadoop.</p><p style="padding-left:30px;text-align:justify;">Apache Hadoop will be available on HTTP port 8088 and port 50070 by default. Open your favorite browser and navigate to http://yourdomain.com:50070 or http://server-ip:50070.</p><p style="text-align:justify;">Congratulation’s! You have successfully installed Apache Hadoop. Thanks for using this tutorial for installing Apache Hadoop in Debian 9 Stretch systems. For additional help or useful information, we recommend you to check <a href="https://hadoop.apache.org/" target="_blank" rel="noopener">the official Apache Hadoop web site</a>.</p><p style="text-align:justify;"><div class="su-box su-box-style-bubbles" id="" style="border-color:#000;border-radius:10px"><div class="su-box-title" style="background-color:#000;color:#FFF;border-top-left-radius:8px;border-top-right-radius:8px">VPS Manage Service Offer</div><div class="su-box-content su-u-clearfix su-u-trim" style="border-bottom-left-radius:8px;border-bottom-right-radius:8px"><strong>If you don’t have time to do all of this stuff, or if this is not your area of expertise, we offer a service to do “VPS Manage Service Offer”, starting from $10 (Paypal payment). 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