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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7335) Force entropy to come from non-true random for tests
Date Fri, 27 May 2011 21:07:47 GMT
Force entropy to come from non-true random for tests

                 Key: HADOOP-7335
                 URL: https://issues.apache.org/jira/browse/HADOOP-7335
             Project: Hadoop Common
          Issue Type: Improvement
          Components: build, test
    Affects Versions: 0.22.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Minor

Passing the system property {{-Djava.security.egd=file:///dev/urandom}} forces the JVM to
seed its PRNG from non-true random (/dev/urandom) instead of the true random (/dev/random).
This makes the tests run faster, since without it they often hang waiting for entropy while
Jetty is initializing.

We should turn this on for the test targets by default, so developers/hudson boxes don't have
to make this change system-wide or use workarounds like rngtools.

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