[jira] [Created] (HDFS-13021) Incorrect storage policy of snapshott file was returned by getStoragePolicy command

["LiXin Ge (JIRA)" <ji...@apache.org>]

LiXin Ge created HDFS-13021:
-------------------------------

             Summary: Incorrect storage policy of snapshott file was returned by getStoragePolicy command
                 Key: HDFS-13021
                 URL: https://issues.apache.org/jira/browse/HDFS-13021
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs, snapshots
    Affects Versions: 3.1.0
            Reporter: LiXin Ge
            Assignee: LiXin Ge


Snapshots are supposed to be immutable and read only, so the file status which in a snapshot path shouldn't follow the original file's change.

The StoragePolicy in snapshot situation acts like a bug now.

-----------

Reproduction：Operation on snapshottable dir {{/storagePolicy}}

*before make snapshot:*

{code:java}

 [bin]# hdfs storagepolicies -setStoragePolicy -path /storagePolicy -policy PROVIDED
 Set storage policy PROVIDED on /storagePolicy

 [bin]# hadoop fs -put /home/file /storagePolicy/file_PROVIDED

 [bin]# hdfs storagepolicies -getStoragePolicy -path /storagePolicy/file_PROVIDED
 The storage policy of /storagePolicy/file_PROVIDED:
 BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}

{code}

*make snapshot and check:*

{code:java}

[bin]# hdfs dfs -createSnapshot /storagePolicy s3_PROVIDED
Created snapshot /storagePolicy/.snapshot/s3_PROVIDED

[bin]# hdfs storagepolicies -getStoragePolicy -path /storagePolicy/.snapshot/s3_PROVIDED/file_PROVIDED
The storage policy of /storagePolicy/.snapshot/s3_PROVIDED/file_PROVIDED:
BlockStoragePolicy{PROVIDED:1, storageTypes=[PROVIDED, DISK], creationFallbacks=[PROVIDED, DISK], replicationFallbacks=[PROVIDED, DISK]} 

{code}

*change the StroagePolicy and check again:*
{code:java}
[bin]# hdfs storagepolicies -setStoragePolicy -path /storagePolicy -policy HOT
Set storage policy HOT on /storagePolicy

[bin]# hdfs storagepolicies -getStoragePolicy -path /storagePolicy/.snapshot/s3_PROVIDED/file_PROVIDED
The storage policy of /storagePolicy/.snapshot/s3_PROVIDED/file_PROVIDED:
BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}   ---- It shouldn't be HOT
{code}



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