Jianfei Jiang updated HDFS-13401:
    Attachment: HDFS-13401.000.patch

> Different behavior in mkdir when the target folder of mount table is uncreated
> ------------------------------------------------------------------------------
>                 Key: HDFS-13401
>                 URL: https://issues.apache.org/jira/browse/HDFS-13401
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: federation, hdfs
>    Affects Versions: 3.0.1
>            Reporter: Jianfei Jiang
>            Priority: Major
>         Attachments: HDFS-13401.000.patch
> In federation cases, if we have a config like below:
> <property>
>  <name>fs.viewfs.mounttable.ClusterX.link./foo</name>
>  <value>hdfs://nn2-clusterx.example.com:8020/footarget</value>
>  </property>
> When the folder hdfs://nn2-clusterx.example.com:8020/projects/footarget is 
> not actually exist, the command {{hdfs dfs ls /}} can still see the folder, 
> but the folder is not actually exist. then we try to use mkdir command to 
> create the viewfs folder {{hdfs dfs mkdir /foo}}, the return code is true, 
> but the folder is not created. However, when we use {{hdfs dfs mkdir -p 
> /foo/xxx}} which have a deeper location to create folder, the folder is 
> successfully created. The results in these two cases may be ambigiuous.

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