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https://issues.apache.org/jira/browse/HDFS-3758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13429417#comment-13429417
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Colin Patrick McCabe commented on HDFS-3758:
--------------------------------------------
Here's a little more explanation of the patch: {{-ononempty}} allows FUSE to
mount over a non-empty directory. Since we previously had a bug which could
result in the fuse mount directory getting full of junk, you can see why this
is useful.
This patch also changes the way we run fuse_dfs slightly. Rather than running
it in the background, we run it in the foreground, piping its stdout and stderr
to java threads. This is the meaning of the {{-f}} option.
> TestFuseDFS test failing
> ------------------------
>
> Key: HDFS-3758
> URL: https://issues.apache.org/jira/browse/HDFS-3758
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: fuse-dfs
> Affects Versions: 1.0.0, 2.0.0-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Attachments: HDFS-3758-b1.001.patch, HDFS-3758.003.patch,
> TestFuseDFS-fix-0002.patch
>
>
> TestFuseDFS.java has two bugs:
> * there is a race condition between mounting the filesystem and testing it
> * it doesn't clear the mount directory before it tries to mount there
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