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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2419) Improve parallel tests
Date Wed, 28 Apr 2010 19:31:49 GMT
Improve parallel tests
----------------------

                 Key: LUCENE-2419
                 URL: https://issues.apache.org/jira/browse/LUCENE-2419
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Build
    Affects Versions: 3.1
            Reporter: Robert Muir
            Assignee: Robert Muir


As mentioned on the dev@ mailing list here: http://www.lucidimagination.com/search/document/93432a677917b9bd/lucenejunitresultformatter_sometimes_fails_to_lock

It would be useful to not create a lockfactory for each test suite (As they are run sequentially
in the same separate JVM).
Additionally, we create a lot of JVMs (26) for each batch, because we have to run one for
each letter.
Instead, we use a technique here to divide up the tests with a custom selector: http://blog.code-cop.org/2009/09/parallel-junit.html
(I emailed the blog author and received permission to use this code)

This gives a nice boost to the speed of overall tests, especially Solr tests, as many start
with an "S", but this is no longer a problem.



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