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Date: Fri, 13 Apr 2007 10:53:15 -0700 (PDT)
From: "Doug Cutting (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-1257) a distributed junit test runner
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    [ https://issues.apache.org/jira/browse/HADOOP-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12488730 ] 

Doug Cutting commented on HADOOP-1257:
--------------------------------------

Bootstrapping could be a little complicated here: do we use an older version of Hadoop to test the new version?  Since Hudson runs on a 4-processor box, we might get some mileage by simply getting junit tests to run in parallel.  Ant's parallel task is almost appropriate, except there's no easy way I can see to get each junit test to be a sub-task of a parallel task.  But perhaps a simple parallel-junit task could be written for this.  Test could still be run in separate JVMs, and we could run as many at once as there are CPUs (a feature of the parallel task).  A 4x speedup would be very welcome!

> a distributed junit test runner
> -------------------------------
>
>                 Key: HADOOP-1257
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1257
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: test
>    Affects Versions: 0.12.3
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>
> It would be nice to have a distributed junit runner that would run 100 instances of each test a separate map, and use counters to count how many times each test passed/failed/hung.

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