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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-11107) Improve tests to not rely on JDK random implementation
Date Thu, 18 Sep 2014 22:56:35 GMT
Andrew Wang created HADOOP-11107:
------------------------------------

             Summary: Improve tests to not rely on JDK random implementation
                 Key: HADOOP-11107
                 URL: https://issues.apache.org/jira/browse/HADOOP-11107
             Project: Hadoop Common
          Issue Type: Improvement
    Affects Versions: 2.5.1
            Reporter: Andrew Wang


As [~daryn] points out on HDFS-6840, writing unit tests that depend on a certain random seed
always generating the same numbers is somewhat brittle, since the JDK does not guarantee this
as part of compatibility. It'd be good to improve our unit testing to be agnostic to the JDK
random implementation, e.g. by providing our own mock random implementation, or through other
methods of verification.



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