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https://issues.apache.org/jira/browse/HDFS-4258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575962#comment-13575962
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Aaron T. Myers commented on HDFS-4258:
--------------------------------------
I think I agree with Daryn. How about this:
* Let's implement HDFS-4437 and back-port that to branch-2 to fix the bug(s)
that have been described here and on HDFS-4437.
* Move the INode ID-related work to a branch off of trunk.
* Once the INode ID work is completed, merge it to trunk.
* At a later date when we're fairly confident nothing is relying on the
rename-breaks-leases semantics, we consider merging INode IDs to branch-2. Or,
perhaps, the INode ID changes could be a good foundation for a useful Hadoop
3.x release.
Thoughts?
> Rename of Being Written Files
> -----------------------------
>
> Key: HDFS-4258
> URL: https://issues.apache.org/jira/browse/HDFS-4258
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client, namenode
> Affects Versions: 3.0.0
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Brandon Li
> Attachments: HDFS-4258.patch, HDFS-4258.patch, HDFS-4258.patch,
> HDFS-4258.patch
>
>
> When a being written file or it's ancestor directories is renamed, the path
> in the file lease is also renamed. Then the writer of the file usually will
> fail since the file path in the writer is not updated.
> Moreover, I think there is a bug as follow:
> # Client writes 0's to F_0="/foo/file" and writes 1's to F_1="/bar/file" at
> the same time.
> # Rename /bar to /baz
> # Rename /foo to /bar
> Then, writing to F_0 will fail since /foo/file does not exist anymore but
> writing to F_1 may succeed since /bar/file exits as a different file. In
> such case, the content of /bar/file could be partly 0's and partly 1's.
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