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https://issues.apache.org/jira/browse/HDFS-14117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16815025#comment-16815025
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Íñigo Goiri commented on HDFS-14117:
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Thanks for the comments [~ayushtkn].
I added more tests and I found a couple issues.
There are still some things to figure.
For example, the way the error is reported is not very clean and it should
report the proper issue.
This last point relates to mounting {{/user}}.
Let's start with the case where we have {{/mnt}} mounted on {{ns0}} and {{ns1}}
mounted and then we have files in each.
/ by default is mounted only to {{ns0}}.
If we try to remove a file that is in {{ns1}} we cannot move the file from
{{ns1}} to the Trash in {{ns0}}.
For us to be able to move to the Trash, we need {{/user/user0/.Trash}} to be
available in {{ns1}}.
For this to have we have to have a mount point for {{/}} or {{/user}} or
{{/user/user0}} or {{/user/user0/.Trash}} with a destination subcluster {{ns1}}
I'll fix the rest of the comments once I figure how to provide a better
exception.
Thanks [~crh] for taking a look, let's follow up on the other JIRA.
> RBF: We can only delete the files or dirs of one subcluster in a cluster with
> multiple subclusters when trash is enabled
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-14117
> URL: https://issues.apache.org/jira/browse/HDFS-14117
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: venkata ramkumar
> Assignee: venkata ramkumar
> Priority: Major
> Labels: RBF
> Attachments: HDFS-14117-HDFS-13891.001.patch,
> HDFS-14117-HDFS-13891.002.patch, HDFS-14117-HDFS-13891.003.patch,
> HDFS-14117-HDFS-13891.004.patch, HDFS-14117-HDFS-13891.005.patch,
> HDFS-14117-HDFS-13891.006.patch, HDFS-14117-HDFS-13891.007.patch,
> HDFS-14117-HDFS-13891.008.patch, HDFS-14117-HDFS-13891.009.patch,
> HDFS-14117-HDFS-13891.010.patch, HDFS-14117-HDFS-13891.011.patch,
> HDFS-14117-HDFS-13891.012.patch, HDFS-14117.001.patch, HDFS-14117.002.patch,
> HDFS-14117.003.patch, HDFS-14117.004.patch, HDFS-14117.005.patch
>
>
> When we delete files or dirs in hdfs, it will move the deleted files or dirs
> to trash by default.
> But in the global path we can only mount one trash dir /user. So we mount
> trash dir /user of the subcluster ns1 to the global path /user. Then we can
> delete files or dirs of ns1, but when we delete the files or dirs of another
> subcluser, such as hacluster, it will be failed.
> h1. Mount Table
> ||Global path||Target nameservice||Target path||Order||Read
> only||Owner||Group||Permission||Quota/Usage||Date Modified||Date Created||
> |/test|hacluster2|/test| | |securedn|users|rwxr-xr-x|[NsQuota: -/-, SsQuota:
> -/-]|2018/11/29 14:37:42|2018/11/29 14:37:42|
> |/tmp|hacluster1|/tmp| | |securedn|users|rwxr-xr-x|[NsQuota: -/-, SsQuota:
> -/-]|2018/11/29 14:37:05|2018/11/29 14:37:05|
> |/user|hacluster2,hacluster1|/user|HASH| |securedn|users|rwxr-xr-x|[NsQuota:
> -/-, SsQuota: -/-]|2018/11/29 14:42:37|2018/11/29 14:38:20|
> commands:
> {noformat}
> 1./opt/HAcluater_ram1/install/hadoop/router/bin> ./hdfs dfs -ls /test/.
> 18/11/30 11:00:47 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> Found 1 items
> -rw-r--r-- 3 securedn supergroup 8081 2018-11-30 10:56 /test/hdfs.cmd
> 2./opt/HAcluater_ram1/install/hadoop/router/bin> ./hdfs dfs -ls /tmp/.
> 18/11/30 11:00:40 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> Found 1 items
> -rw-r--r-- 3 securedn supergroup 6311 2018-11-30 10:57 /tmp/mapred.cmd
> 3../opt/HAcluater_ram1/install/hadoop/router/bin> ./hdfs dfs -rm
> /tmp/mapred.cmd
> 18/11/30 11:01:02 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> rm: Failed to move to trash: hdfs://router/tmp/mapred.cmd: rename destination
> parent /user/securedn/.Trash/Current/tmp/mapred.cmd not found.
> 4./opt/HAcluater_ram1/install/hadoop/router/bin> ./hdfs dfs -rm /test/hdfs.cmd
> 18/11/30 11:01:20 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> 18/11/30 11:01:22 INFO fs.TrashPolicyDefault: Moved:
> 'hdfs://router/test/hdfs.cmd' to trash at:
> hdfs://router/user/securedn/.Trash/Current/test/hdfs.cmd
> {noformat}
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