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From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] Created: (MATH-505) TestUtils is thread-hostile
Date Tue, 01 Feb 2011 00:29:29 GMT
TestUtils is thread-hostile
---------------------------

                 Key: MATH-505
                 URL: https://issues.apache.org/jira/browse/MATH-505
             Project: Commons Math
          Issue Type: Bug
    Affects Versions: 2.1, 1.2
            Reporter: Sebb


TestUtils has several mutable static fields which are not synchronised, or volatile.

If one of the fields is updated by thread A, there is no guarantee that thread B will see
the full update - it may see a partially updated object.

Furthermore, at least some of the static fields reference a mutable object, which can be changed
whilst another thread is using it.

As far as I can tell, this class must only ever be used by a single thread otherwise the results
will be unpredictable.

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