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- <h1><a name="JobBrowser-IntroducingJobBrowser"></a>Introducing Job Browser</h1>
- <p>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>
- <h2><a name="JobBrowser-Contents"></a>Contents</h2>
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- <ul>
- <li><a href='#JobBrowser-IntroducingJobBrowser'>Introducing Job Browser</a></li>
- <li><a href='#JobBrowser-JobBrowserInstallationandConfiguration'>Job Browser Installation and Configuration</a></li>
- <li><a href='#JobBrowser-StartingJobBrowser'>Starting Job Browser</a></li>
- <li><a href='#JobBrowser-FilteringtheJobBrowserList'>Filtering the Job Browser List</a></li>
- <li><a href='#JobBrowser-ViewingJobInformationandLogs'>Viewing Job Information and Logs</a></li>
- <li><a href='#JobBrowser-ViewingJobOutput'>Viewing Job Output</a></li>
- </ul></div>
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- <a name="JobBrowser-JobBrowserInstallationandConfiguration"></a></p>
- <h1><a name="JobBrowser-JobBrowserInstallationandConfiguration"></a>Job Browser Installation and Configuration</h1>
- <p>Job Browser is one of the applications that is installed as part of Hue. For more information about installing Hue, see <a href="https://ccp.cloudera.com/display/CDHDOC/Hue+Installation">Hue Installation</a>.</p>
- <p>By default, a JobBrowser user can see submitted job information for all users – both his/her own jobs and those of other users. If this behavior is not desirable, you can change the value of the <tt>share_jobs</tt> property under the <tt>[jobbrowser]</tt> section in the <tt>etc/hue/hue.ini</tt> file. Setting this property to <tt>false</tt> will restrict the viewing of submitted jobs to only the job submitter and Hue administrators.
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- <p><a name="JobBrowser-StartingJobBrowser"></a></p>
- <h1><a name="JobBrowser-StartingJobBrowser"></a>Starting Job Browser</h1>
- <p>To start Job Browser, click the <b>Job Browser</b> icon ( <span class="image-wrap" style=""><img src="/jobbrowser/static/help/images/21103323.png" height="26" style="border: 0px solid black"/></span> ) in the navigation bar at the top of the Hue web page.</p>
- <p>If there are no jobs that have been run, the <b>Welcome to the Job Browser</b> page opens, with links to the Job Designer and Beeswax.</p>
- <p>If there are jobs running, then the Job Browser list appears.
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- <p><a name="JobBrowser-FilteringtheJobBrowserList"></a></p>
- <h1><a name="JobBrowser-FilteringtheJobBrowserList"></a>Filtering the Job Browser List</h1>
- <p><b>To filter the jobs displayed in the Job Browser list:</b></p>
- <ul>
- <li>To filter the jobs by their state (such as <b>Running</b> or <b>Completed</b>), choose a state from the <b>Job status</b> drop-down menu.
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- <li>To filter by a user who ran the jobs, enter the user's name in the <b>User Name</b> query box.
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- <li>To filter by job name, enter the name in the <b>Text</b> query box.
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- <li>To clear the filters, choose <b>All States</b> from the <b>Job status</b> drop-down menu and delete any text in the <b>User Name</b> and <b>Text</b> query boxes. </li>
- <li>To display retired jobs, check the <b>Show retired jobs</b> 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 <tt>mapred.jobtracker.retirejob.interval</tt>. The retired jobs no longer display after the JobTracker is restarted.</li>
- </ul>
- <p><a name="JobBrowser-ViewingJobInformationandLogs"></a></p>
- <h1><a name="JobBrowser-ViewingJobInformationandLogs"></a>Viewing Job Information and Logs</h1>
- <p><b>To view job information for an individual job:</b></p>
- <ol>
- <li>In the <b>Job Browser</b> window, click <b>View</b> at the right of the job you want to view.<br/>
- This shows the <b>Job</b> page for the job, with the recent tasks associated with the job are displayed in the <b>Tasks</b> tab.
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- <li>Click the <b>Metadata</b> tab to view the metadata for this job.
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- <li>Click the <b>Counters</b> tab to view the counter metrics for the job.
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- </ol>
- <p><b>To view details about the tasks associated with the job:</b></p>
- <ol>
- <li>In the <b>Job</b> window, click the <b>View All Tasks</b> link at the right just above the <b>Recent Tasks</b> list.<br/>
- This lists all the tasks associated with the job.
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- <li>Click <b>Attempts</b> to the right of a task to view the attempts for that task.
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- </ol>
- <p><b>To view information about an individual task:</b></p>
- <ol>
- <li>in the <b>Job</b> window, click the <b>View</b> link to the right of the task.<br/>
- The attempts associated with the task are displayed.
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- <li>Click the <b>Metadata</b> tab to view metadata for this task.<br/>
- The metadata associated with the task is displayed.
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- <li>To view the Hadoop counters for a task, click the <b>Counters</b> tab.<br/>
- The counters associated with the task are displayed.
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- <li>To return to the <b>Job</b> window for this job, click the job number in the status panel at the left of the window.
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- </ol>
- <p><b>To view details about a task attempt:</b></p>
- <ol>
- <li>In the <b>Job Task</b> window, click the <b>View</b> link to the right of the task attempt.<br/>
- The metadata associated with the attempt is displayed under the <b>Metadata</b> tab.
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- <br class="atl-forced-newline" /></li>
- <li>To view the Hadoop counters for the task attempt, click the <b>Counters</b> tab.<br/>
- The counters associated with the attempt are displayed.
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- <li>To view the logs associated with the task attempt, click the <b>Logs</b> tab.<br/>
- The logs associated with the task attempt are displayed.
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- <li>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.
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- </ol>
- <p><a name="JobBrowser-ViewingJobOutput"></a></p>
- <h1><a name="JobBrowser-ViewingJobOutput"></a>Viewing Job Output</h1>
- <p><b>To view job output:</b></p>
- <ol>
- <li>In the <b>Job Browser</b> window, double-click the job.
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- <li>To view the output of the job, click the link under <b>Output</b> in the status panel at the left of the window.<br/>
- This takes you to the job output directory in the <b>File Browser</b>.</li>
- </ol>
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