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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-1837) DNS needs to be stubbed for tests
Date Thu, 14 Apr 2011 22:00:06 GMT
DNS needs to be stubbed for tests

                 Key: HDFS-1837
                 URL: https://issues.apache.org/jira/browse/HDFS-1837
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: test
    Affects Versions: 0.23.0
            Reporter: Daryn Sharp
            Assignee: Daryn Sharp

The tests use various short hostnames that are assumed to not exist.  Ex. host, somehost,
host{1-5}, foo, etc.  If the host really does resolve then it triggers a hardcoded 45 retry
attempts.  Adding 45s+ to a negative test really slows down the test suite.

Some people may be mildly unlucky to have a few of these dummy hostnames resolve in their
domain.  They will take a penalty on the magnitude of minutes.  Those of us unfortunate enough
to have wildcard dns resolution are unable to run many of the tests w/o unplugging from the
network because the test suite won't finish (ex. I killed a run after 16 hours).

The tests need to have dns stubbed out to only resolve the host itself and localhost.

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