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https://issues.apache.org/jira/browse/HADOOP-9857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735457#comment-13735457
]
Hudson commented on HADOOP-9857:
--------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #4243 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/4243/])
HADOOP-9857. Tests block and sometimes timeout on Windows due to invalid
entropy source. Contributed by Chris Nauroth. (cnauroth:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1512522)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-project/pom.xml
> Tests block and sometimes timeout on Windows due to invalid entropy source.
> ---------------------------------------------------------------------------
>
> Key: HADOOP-9857
> URL: https://issues.apache.org/jira/browse/HADOOP-9857
> Project: Hadoop Common
> Issue Type: Bug
> Components: build, test
> Affects Versions: 3.0.0, 2.1.1-beta
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Fix For: 3.0.0, 2.1.1-beta
>
> Attachments: HADOOP-9857.1.patch, HADOOP-9857.2.patch
>
>
> Tests are configured to set the entropy source to {{file:///dev/urandom}} to
> prevent blocking on machines with low entropy. We've observed that on
> Windows, this will cause tests to block for 5 seconds trying to access this
> non-existent path the first time the process does something that needs
> entropy, such as using a {{SecureRandom}} or creating a {{UUID}}. This can
> cause tests to fail due to timeouts. In addition to the initial 5-second
> blocking, this causes the JVM to fall back to a slower, non-native seed
> generation implementation.
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