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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7298) Add test utility for writing multi-threaded tests
Date Wed, 18 May 2011 05:24:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035202#comment-13035202
] 

Todd Lipcon commented on HADOOP-7298:
-------------------------------------

The HBase class lives here:
http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/MultithreadedTestUtil.java

For an example usage, see testLABThreading in the following test:
http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestMemStoreLAB.java

> Add test utility for writing multi-threaded tests
> -------------------------------------------------
>
>                 Key: HADOOP-7298
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7298
>             Project: Hadoop Common
>          Issue Type: Test
>          Components: test
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.22.0
>
>
> A lot of our tests spawn off multiple threads in order to check various synchronization
issues, etc. It's often tedious to write these kinds of tests because you have to manually
propagate exceptions back to the main thread, etc.
> In HBase we have developed a testing utility which makes writing these kinds of tests
much easier. I'd like to copy that utility into Hadoop so we can use it here as well.

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