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https://issues.apache.org/jira/browse/HDFS-15563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HDFS-15563:
------------------------------
Description:
Note: Only impacts a user if {{dfs.namenode.snapshot.trashroot.enabled}} is
enabled.
Root cause analysis:
DFSClient#getSnapshotRoot
Thanks [~shashikant] for the test case addition.
---
Repro:
{code:java}
1. snapshottable directory present in the cluster
hdfs lsSnapshottableDir
drwx-x-x 0 hrt_2 hrt_2 0 2020-09-08 07:42 0 65536 /user/hrt_2
drwxr-xr-x 0 hrt_4 hrt_4 0 2020-09-08 13:16 0 65536 /user/hrt_4/newdir/subdir2.
Created a new directory outside snapshottable directory
hdfs dfs -mkdir /user/hrt_4/newdir/subdir23. Tried to delete subdir2 , it failed
hdfs dfs -rm -r /user/hrt_4/newdir/subdir2
rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
/user/hrt_4/newdir/subdir2 and dest
/user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are not
under the same snapshot root.
{code}
"*/user/hrt_4/newdir/subdir2*" , the trash root location is coming to be
"*/user/hrt_4/newdir/subdir/.Trash*"
as clear from the msg here:
{noformat}
rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
/user/hrt_4/newdir/subdir2 and dest
/user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are not
under the same snapshot root.{noformat}
was:
{code:java}
1. snapshottable directory present in the cluster
hdfs lsSnapshottableDir
drwx-x-x 0 hrt_2 hrt_2 0 2020-09-08 07:42 0 65536 /user/hrt_2
drwxr-xr-x 0 hrt_4 hrt_4 0 2020-09-08 13:16 0 65536 /user/hrt_4/newdir/subdir2.
Created a new directory outside snapshottable directory
hdfs dfs -mkdir /user/hrt_4/newdir/subdir23. Tried to delete subdir2 , it failed
hdfs dfs -rm -r /user/hrt_4/newdir/subdir2
rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
/user/hrt_4/newdir/subdir2 and dest
/user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are not
under the same snapshot root.
{code}
"*/user/hrt_4/newdir/subdir2*" , the trash root location is coming to be
"*/user/hrt_4/newdir/subdir/.Trash*"
as clear from the msg here:
{noformat}
rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
/user/hrt_4/newdir/subdir2 and dest
/user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are not
under the same snapshot root.{noformat}
> Incorrect getTrashRoot return value when a non-snapshottable dir prefix
> matches the path of a snapshottable dir
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-15563
> URL: https://issues.apache.org/jira/browse/HDFS-15563
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: snapshots
> Affects Versions: 3.4.0
> Reporter: Nilotpal Nandi
> Assignee: Siyao Meng
> Priority: Major
> Fix For: 3.4.0
>
>
> Note: Only impacts a user if {{dfs.namenode.snapshot.trashroot.enabled}} is
> enabled.
> Root cause analysis:
> DFSClient#getSnapshotRoot
> Thanks [~shashikant] for the test case addition.
> ---
> Repro:
> {code:java}
> 1. snapshottable directory present in the cluster
> hdfs lsSnapshottableDir
> drwx-x-x 0 hrt_2 hrt_2 0 2020-09-08 07:42 0 65536 /user/hrt_2
> drwxr-xr-x 0 hrt_4 hrt_4 0 2020-09-08 13:16 0 65536
> /user/hrt_4/newdir/subdir2. Created a new directory outside snapshottable
> directory
> hdfs dfs -mkdir /user/hrt_4/newdir/subdir23. Tried to delete subdir2 , it
> failed
> hdfs dfs -rm -r /user/hrt_4/newdir/subdir2
> rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
> /user/hrt_4/newdir/subdir2 and dest
> /user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are
> not under the same snapshot root.
> {code}
> "*/user/hrt_4/newdir/subdir2*" , the trash root location is coming to be
> "*/user/hrt_4/newdir/subdir/.Trash*"
> as clear from the msg here:
> {noformat}
> rm: Failed to move to trash: hdfs://ns1/user/hrt_4/newdir/subdir2: Source
> /user/hrt_4/newdir/subdir2 and dest
> /user/hrt_4/newdir/subdir/.Trash/hdfs/Current/user/hrt_4/newdir/subdir2 are
> not under the same snapshot root.{noformat}
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