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https://issues.apache.org/jira/browse/HDFS-12882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282916#comment-16282916
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Íñigo Goiri commented on HDFS-12882:
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The approach in [^HDFS-12882.04.patch] is cleaner.
Can we document a little more what the token means?
One has to go all the way to {{FSNamesystem}} to track it.

> Support full open(PathHandle) contract in HDFS
> ----------------------------------------------
>
>                 Key: HDFS-12882
>                 URL: https://issues.apache.org/jira/browse/HDFS-12882
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs-client
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>         Attachments: HDFS-12882.00.patch, HDFS-12882.00.salient.txt, 
> HDFS-12882.01.patch, HDFS-12882.02.patch, HDFS-12882.03.patch, 
> HDFS-12882.04.patch
>
>
> HDFS-7878 added support for {{open(PathHandle)}}, but it only partially 
> implemented the semantics specified in the contract (i.e., open-by-inodeID). 
> HDFS should implement all permutations of the default options for 
> {{PathHandle}}.



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