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https://issues.apache.org/jira/browse/HADOOP-6461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802325#action_12802325
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Steve Loughran commented on HADOOP-6461:
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I might be seeing this, though its confusing because embedded use can be a bit
quirky.
# the changes to the test global filter should be enough to test the method
working, as that testServletFilter() test would now fail if there isn't a
webapps/test resource
# need one more test that triest to create an HttpServer instance for which
there isn't a name, check that the right exception got thrown.
# This would be aided if the getWebappsPath(String) method threw a
FileNotFoundException when the file was missing; It is technically a missing
file, and the proposed test would be able to look for that exception only (any
other IOE would be a failure of the test)
> webapps aren't located correctly post-split
> -------------------------------------------
>
> Key: HADOOP-6461
> URL: https://issues.apache.org/jira/browse/HADOOP-6461
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-6461.txt, hadoop-6461.txt
>
>
> Post-split, when one builds common it creates an empty build/webapps dir. If
> you then try to launch the NN for example using
> HADOOP_HDFS_HOME=/path/to/hdfs hdfs namenode, HttpServer.getWebAppsPath
> locates the empty common webapps dir, and the NN web UI fails to load.
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