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From "George Porter (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5164) Subclasses of ClusterMapReduceTestCase can't easily add new configuration parameters
Date Wed, 18 Feb 2009 22:28:01 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

George Porter updated HADOOP-5164:
----------------------------------

    Release Note: Modified the behavior of ClusterMapReduceTestCase so that setupCluster()
is no longer called automatically in TestCase.setUp().  Now, you must explicitly call setupCluster()
for each test you wish to run (or you can share a single cluster among several tests).

Added a release note.

> Subclasses of ClusterMapReduceTestCase can't easily add new configuration parameters
> ------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5164
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5164
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: test
>            Reporter: George Porter
>         Attachments: HADOOP-5164.1.patch, HADOOP-5164.2.patch, HADOOP-5164.patch
>
>
> Currently there is not a clean way for subclasses of ClusterMapReduceTestCase to add
to the JobConf used to start the cluster daemons.
> The startCluster() method does take a Properties object that is added to the JobConf
used to the start the daemons.  However, startCluster() is called from JUnit inside the setUp()
method, which sets this parameter to be null.
> If you try to override setUp() in a subclass of ClusterMapReduceTestCase, then you won't
be able to invoke the TestCase.setUp() ancestor without calling ClusterMapReduceTestCase's
setUp() (which will pass in the null parameter).  On the other hand, if you just call startCluster()
within your test method, then you would be starting up a cluster that was already started.

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