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https://issues.apache.org/jira/browse/HADOOP-9416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13697336#comment-13697336
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Colin Patrick McCabe commented on HADOOP-9416:
----------------------------------------------

{code}
+  public T next(final FileSystem fs, final Path p)
+      throws IOException {
+    throw new AssertionError("Should not be called without first overriding!");
+  }
{code}

These and related methods should be abstract if they have to be overridden by 
subclasses.
                
> Add new symlink resolution methods to FileSystem and FSLinkResolver
> -------------------------------------------------------------------
>
>                 Key: HADOOP-9416
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9416
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs
>    Affects Versions: 3.0.0
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>         Attachments: hadoop-9416-1.patch, hadoop-9416-2.patch, 
> hadoop-9416-3.patch, hadoop-9416-4.patch, hadoop-9416-5.patch
>
>
> Add new methods for symlink resolution to FileSystem, and add resolution 
> support for FileSystem to FSLinkResolver.

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