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https://issues.apache.org/jira/browse/HDFS-4258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13508429#comment-13508429
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Todd Lipcon commented on HDFS-4258:
-----------------------------------
I'm not sure if this is actually a bug: I can see some applications requiring
the semantics that moving (or deleting) a file underneath an active writer
would break the writer's ability to continue to add new blocks.
Regarding the scenario of the "mixed up" blocks, I'm not sure that can happen,
since {{getAdditionalBlock()}} takes the previous block as an argument. In this
case, the previous block would not match up, and the request to allocate a new
block on the 'wrong' file would fail, right?
> 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
> Reporter: Tsz Wo (Nicholas), SZE
>
> 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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