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https://issues.apache.org/jira/browse/HADOOP-12172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14613898#comment-14613898
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Hudson commented on HADOOP-12172:
---------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #2173 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/2173/])
HADOOP-12172. FsShell mkdir -p makes an unnecessary check for the existence of
the parent. Contributed by Chris Nauroth. (cnauroth: rev
f3796224bfdfd88e2428cc8a9915bdfdc62b48f3)
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Mkdir.java
> FsShell mkdir -p makes an unnecessary check for the existence of the parent.
> ----------------------------------------------------------------------------
>
> Key: HADOOP-12172
> URL: https://issues.apache.org/jira/browse/HADOOP-12172
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HADOOP-12172.001.patch
>
>
> The {{mkdir}} command in {{FsShell}} checks for the existence of the parent
> of the directory and returns an error if it doesn't exist. The {{-p}} option
> suppresses the error and allows the directory creation to continue,
> implicitly creating all missing intermediate directories. However, the
> existence check still runs even with {{-p}} specified, and its result is
> ignored. Depending on the file system, this is a wasteful RPC call (HDFS) or
> HTTP request (WebHDFS/S3/Azure) imposing extra latency for the client and
> extra load for the server.
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