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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1052) Map tasks not getting killed
Date Wed, 28 Feb 2007 22:55:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12476750

Doug Cutting commented on HADOOP-1052:

> Could you please guide me [ ... ]

I'm sure you can find documentation on JUnit, but the short of it is that you implement a
class that extends JUnit's TestCase whose class name starts with "Test", and that is placed
in the src/test tree.  Then you define methods within that class whose names begin with "test",
and call JUnit's "assert" methods within these.  These will then be run by "ant test".

The TestMapRed.java is a standalone MapReduce-based test, as is TestFileSystem.java.  Even
simpler, not MR tests are TestPath.java, etc.  Tests based on MiniMRCluster are TestMiniMRLocalFS.

I hope that helps.

> Map tasks not getting killed
> ----------------------------
>                 Key: HADOOP-1052
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1052
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.11.2
>         Environment: Redhat, 8 node cluster
>            Reporter: Srikanth Kakani
> -----------Steps to reproduce---------
> 1. Create and compile a map reduce application with 
> public void map(WritableComparable key,
>                     Writable value,
>                     OutputCollector output, Reporter reporter) throws IOException {
>      reporter.setStatus("Started");
>     Thread.sleep(3600000);
>     report.setStatus("Should have been killed"); 
> }
> 2. Run the task with the default hadoop configuration: 
> <property>
>   <name>mapred.task.timeout</name>
>   <value>1200000</value>
>   <description>The number of milliseconds before a task will be
>   terminated if it neither reads an input, writes an output, nor
>   updates its status string.
>   </description>
> </property>
> ----------------Result------------------
> The task does not get killed, and the job is successful
> ----------------Expected Result------------------
> The map tasks get killed and the job should fail.
> -Srikanth

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