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https://issues.apache.org/jira/browse/HDFS-3453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285139#comment-13285139
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Tsz Wo (Nicholas), SZE commented on HDFS-3453:
----------------------------------------------
Merged to branch-1.1.
> HDFS does not use ClientProtocol in a backward-compatible way
> -------------------------------------------------------------
>
> Key: HDFS-3453
> URL: https://issues.apache.org/jira/browse/HDFS-3453
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Affects Versions: 1.0.0
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: 1.1.0
>
> Attachments: hdfs-3453-branch-1.patch, hdfs-3453-branch-1.patch
>
>
> HDFS-617 was brought into branch-0.20-security/branch-1 to support
> non-recursive create, along with HADOOP-6840 and HADOOP-6886. However, the
> changes in HDFS was done in an incompatible way, making the client unusable
> against older clusters, even when plain old create() is called. This is
> because DFS now internally calls create() through the newly introduced
> method. By simply changing how the methods are wired internally, we can
> remove this limitation. We may eventually switch back to the approach in
> HDFS-617 when the majority of users adopt branch-1 based releases.
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