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Da Zhou commented on HADOOP-15940:
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[~tmarquardt], thanks for review.
Yes, the patch missed the case for FileNotFoundException.
For the behavior of rename dir:
- HDFS contract [tests |https://github.com/apache/hadoop/blob/a55d6bba71c81c1c4e9d8cd11f55c78f10a548b0/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/FileSystemContractBaseTest.java#L765]assume
rename a directory onto itself should fail.
- HDFS [doc |https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/filesystem/filesystem.html#boolean_renamePath_src_Path_d]
said "Renaming a directory onto itself is no-op; return value is not specified.In POSIX the
result is False; in HDFS the result is True."
- The fix provided by you also return false, because service will return "INVALID_RENAME_SOURCE_PATH"
error code for such case.
Based on the above, do you think we should override the contract test so renameDirToItself
should return *false* for this corner case?
> ABFS: For HNS account, avoid unnecessary get call when doing Rename
> -------------------------------------------------------------------
>
> Key: HADOOP-15940
> URL: https://issues.apache.org/jira/browse/HADOOP-15940
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.2.0
> Reporter: Da Zhou
> Assignee: Da Zhou
> Priority: Major
> Attachments: HADOOP-15940-001.patch
>
>
> When rename, there is always a GET dst file status call, this is not necessary.
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