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https://issues.apache.org/jira/browse/HDFS-2336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13104996#comment-13104996
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Owen O'Malley commented on HDFS-2336:
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You still haven't expressed a bug. HFTP was always designed to work as the HTTP
front end for HDFS. What non-HDFS backend are you imagining?
> hftp only supports remote hdfs servers
> --------------------------------------
>
> Key: HDFS-2336
> URL: https://issues.apache.org/jira/browse/HDFS-2336
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.20.205.0, 0.23.0
> Reporter: Daryn Sharp
> Fix For: 0.23.0
>
>
> The new token renewal implementation appears to introduce invalid assumptions
> regarding token kinds.
> Any token acquired over http is assumed to be hftp, so the kind is
> unconditionally changed to hftp. This precludes the acquisition of any other
> token types over http. This new limitation was added to a generic method in
> a public class. It should have been encapsulated in the hftp class, not the
> generic http token fetching methods.
> Furthermore, hftp will unconditionally change a hftp token's kind to hdfs. I
> believe this assumption means that hftp is now broken if the remote cluster's
> default filesystem is not hdfs.
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