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- <html lang="en-us" xml:lang="en-us">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
- <link rel="stylesheet" type="text/css" href="commonltr.css"/>
- <title>Job Browser</title>
- </head>
- <body id="topic_7"><a name="topic_7"><!-- --></a>
- <h1 class="title topictitle1">Job Browser </h1>
- <div class="body conbody">
- <p class="p" id="topic_7__p_65"><a name="topic_7__p_65"><!-- --></a>
- The Job Browser application lets you to examine the Hadoop MapReduce jobs running on your Hadoop cluster. Job
- Browser presents the job and tasks in layers. The top layer is a list of jobs, and you can link to a list of that
- job's tasks. You can then view a task's attempts and the properties of each attempt, such as state, start and end
- time, and output size. To troubleshoot failed jobs, you can also view the logs of each attempt.
- </p>
- </div>
- <div class="topic concept nested1" xml:lang="en-US" lang="en-US" id="topic_7_1"><a name="topic_7_1"><!-- --></a>
- <h2 class="title topictitle2">
- Job Browser Installation and Configuration
- </h2>
- <div class="body conbody">
- <p class="p">Job Browser is one of the applications installed as part of Hue. <span class="ph">For information about installing and configuring Hue,
- see Hue Installation in <a class="xref" href="http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Installation-Guide/CDH4-Installation-Guide.html" target="_blank">http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Installation-Guide/CDH4-Installation-Guide.html</a>.</span></p>
- <p class="p">Job Browser can display both MRv1 and MRv2 jobs, but must be configured
- to display one type at a time. See MapReduce (MRv1) and YARN (MRv2) Cluster Configuration in
- <a class="xref" href="http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Installation-Guide/CDH4-Installation-Guide.html" target="_blank">CDH4
- Installation</a>.</p>
- </div>
- </div>
- <div class="topic concept nested1" xml:lang="en-US" lang="en-US" id="topic_7_2"><a name="topic_7_2"><!-- --></a>
- <h2 class="title topictitle2">
- Starting Job Browser
- </h2>
- <div class="body conbody">
- <p class="p">Click the <strong class="ph b">Job Browser</strong> icon (<img class="image" src="/static/art/help/icon_jobbrowser_24.png"/>) in the navigation bar at the top of the Hue web page. </p>
- <p class="p">
- If there are no jobs that have been run, the <strong class="ph b">Welcome to the Job Browser</strong> page opens, with links to the Job
- Designer and Beeswax.
- </p>
- <p class="p" id="topic_7_2__p_67"><a name="topic_7_2__p_67"><!-- --></a>
- If there are jobs running, then the Job Browser list appears.
- </p>
- </div>
- </div>
- <div class="topic concept nested1" xml:lang="en-US" lang="en-US" id="topic_7_3"><a name="topic_7_3"><!-- --></a>
- <h2 class="title topictitle2">
- Filtering the Job Browser List
- </h2>
- <div class="body conbody">
- <ul class="ul">
- <li class="li">To filter the jobs by their state (such as <strong class="ph b">Running</strong> or <strong class="ph b">Completed</strong>), choose a state from the <strong class="ph b">Job status</strong> drop-down menu.</li>
- <li class="li">To filter by a user who ran the jobs, enter the user's name in the <strong class="ph b">User Name</strong> query box.</li>
- <li class="li">To filter by job name, enter the name in the <strong class="ph b">Text</strong> query box.</li>
- <li class="li">To clear the filters, choose <strong class="ph b">All States</strong> from the <strong class="ph b">Job status</strong> drop-down menu and delete any text in the <strong class="ph b">User Name</strong> and <strong class="ph b">Text</strong> query boxes.</li>
- <li class="li" id="topic_7_3__li_68"><a name="topic_7_3__li_68"><!-- --></a>To display retired jobs, check the <strong class="ph b">Show retired jobs</strong> checkbox. Retired jobs show somewhat limited information – for example, information on maps and reduces and job duration is not available. Jobs are designated as Retired by the JobTracker based on the value of <samp class="ph codeph">mapred.jobtracker.retirejob.interval</samp>. The retired jobs no longer display after the JobTracker is restarted.</li>
- </ul>
- </div>
- </div>
- <div class="topic concept nested1" xml:lang="en-US" lang="en-US" id="topic_7_4"><a name="topic_7_4"><!-- --></a>
- <h2 class="title topictitle2">
- Viewing Job Information and Logs
- </h2>
- <div class="body conbody">
- <div class="note note"><span class="notetitle"><img src="/static/art/help/note.jpg"/>
- <b>Note</b>:</span> At any level you can view the log for an object by clicking the
- <a name="topic_7_4__image_ym1_fy5_wj"><!-- --></a><img class="image" id="topic_7_4__image_ym1_fy5_wj" src="/static/art/help/log.png"/> icon in the Logs column. </div>
- <p class="p">
- <strong class="ph b">To view job information for an individual job:</strong>
- </p>
- <ol class="ol">
- <li class="li">In the <strong class="ph b">Job Browser</strong> window, click <strong class="ph b">View</strong> at the right of the job you want to view.
- This shows the <strong class="ph b">Job</strong> page for the job, with the recent tasks associated with the job are displayed in the <strong class="ph b">Tasks</strong> tab.</li>
- <li class="li">Click the <strong class="ph b">Metadata</strong> tab to view the metadata for this job.</li>
- <li class="li">Click the <strong class="ph b">Counters</strong> tab to view the counter metrics for the job.</li>
- </ol>
- <p class="p">
- <strong class="ph b">To view details about the tasks associated with the job:</strong>
- </p>
- <ol class="ol">
- <li class="li">In the <strong class="ph b">Job</strong> window, click the <strong class="ph b">View All Tasks</strong> link at the right just above the <strong class="ph b">Recent Tasks</strong> list.
- This lists all the tasks associated with the job.</li>
- <li class="li">Click <strong class="ph b">Attempts</strong> to the right of a task to view the attempts for that task.</li>
- </ol>
- <p class="p">
- <strong class="ph b">To view information about an individual task:</strong>
- </p>
- <ol class="ol">
- <li class="li">In the <strong class="ph b">Job</strong> window, click the <strong class="ph b">View</strong> link to the right of the task.
- The attempts associated with the task are displayed.</li>
- <li class="li">Click the <strong class="ph b">Metadata</strong> tab to view metadata for this task.
- The metadata associated with the task is displayed.</li>
- <li class="li">To view the Hadoop counters for a task, click the <strong class="ph b">Counters</strong> tab.
- The counters associated with the task are displayed.</li>
- <li class="li">To return to the <strong class="ph b">Job</strong> window for this job, click the job number in the status panel at the left of the window.</li>
- </ol>
- <p class="p">
- <strong class="ph b">To view details about a task attempt:</strong>
- </p>
- <ol class="ol">
- <li class="li">In the <strong class="ph b">Job Task</strong> window, click the <strong class="ph b">View</strong> link to the right of the task attempt.
- The metadata associated with the attempt is displayed under the <strong class="ph b">Metadata</strong> tab.</li>
- <li class="li">To view the Hadoop counters for the task attempt, click the <strong class="ph b">Counters</strong> tab.
- The counters associated with the attempt are displayed.</li>
- <li class="li">To view the logs associated with the task attempt, click the <strong class="ph b">Logs</strong> tab.
- The logs associated with the task attempt are displayed.</li>
- <li class="li" id="topic_7_4__li_69"><a name="topic_7_4__li_69"><!-- --></a>To return to the list of tasks for the current job, click the task number in the status panel at the left of the window.</li>
- </ol>
- </div>
- </div>
- <div class="topic concept nested1" xml:lang="en-US" lang="en-US" id="topic_7_5"><a name="topic_7_5"><!-- --></a>
- <h2 class="title topictitle2">
- Viewing Job Output
- </h2>
- <div class="body conbody">
- <ol class="ol">
- <li class="li">In the <strong class="ph b">Job Browser</strong> window, click the link in the ID column.</li>
- <li class="li">To view the output of the job, click the link under <strong class="ph b">OUTPUT</strong> in the panel at the left of the window.
- This takes you to the job output directory in the <strong class="ph b">File Browser</strong>.</li>
- </ol>
- </div>
- </div>
- </body>
- </html>
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