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Posted to hdfs-issues@hadoop.apache.org by "Jianfei Jiang (JIRA)" <ji...@apache.org> on 2018/04/09 09:27:00 UTC
[jira] [Comment Edited] (HDFS-13401) Different behavior in mkdir
when the target folder of mount table is uncreated
[ https://issues.apache.org/jira/browse/HDFS-13401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16430306#comment-16430306 ]
Jianfei Jiang edited comment on HDFS-13401 at 4/9/18 9:26 AM:
--------------------------------------------------------------
As InternalDirOfViewFs is readonly, The path of a mount path cannot be created if no deeper path is givern. I made a prospective in patch 000, mkdir function for ViewFileSystem is changed when resolving the path. I wonder if it is necessary to make this change and if this change is proper.
Try to change mkdir function in FileContext as well.
was (Author: jiangjianfei):
As InternalDirOfViewFs is readonly, The path of a mount path cannot be created if no deeper path is givern. I changed mkdir function for ViewFileSystem when resolving the path. I wonder if it is necessary to make this change and if this change is proper.
Try to change mkdir function in FileContext as well.
> 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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