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https://issues.apache.org/jira/browse/HDFS-12897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16311555#comment-16311555
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Rakesh R commented on HDFS-12897:
---------------------------------
Good catch [~xiaochen].
bq. assertEquals("Got unexpected erasure coding policy", ecPolicy,
fs.getErasureCodingPolicy(snap2ECDir)); // <-- shouldn't
IIRC, there was no discussion about this behavior. I had referred
[EncryptionZone unit
testcase|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestEncryptionZones.java#L1337]
and followed same test pattern. I could see same behavior in EZ as well, could
you check it once.
{code}
fsWrapper.delete(zone, true);
fsWrapper.mkdir(zone, FsPermission.getDirDefault(), true);
final Path snap2 = fs.createSnapshot(zoneParent, "snap2");
final Path snap2Zone = new Path(snap2, zone.getName());
assertNull("Expected null ez path",
dfsAdmin.getEncryptionZoneForPath(snap2Zone));
// Create the encryption zone again
dfsAdmin.createEncryptionZone(zone, TEST_KEY2, NO_TRASH);
// FYI, I've added to check there is no encryption policy set as there was
no policy in this snapshot.
assertNull("Expected null ez path",
dfsAdmin.getEncryptionZoneForPath(snap2Zone));
{code}
Probably, we could add this behavioral changes to the {{release notes}} as well.
> Path not found when we get the ec policy for a .snapshot dir
> ------------------------------------------------------------
>
> Key: HDFS-12897
> URL: https://issues.apache.org/jira/browse/HDFS-12897
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: erasure-coding, hdfs, snapshots
> Affects Versions: 3.0.0-alpha1, 3.1.0
> Reporter: Harshakiran Reddy
> Assignee: LiXin Ge
> Attachments: HDFS-12897.001.patch, HDFS-12897.002.patch,
> HDFS-12897.003.patch
>
>
> Scenario:-
> ---------------
> Operation on snapshot dir.
> *EC policy*
> bin> ./hdfs ec -getPolicy -path /dir/
> RS-3-2-1024k
> bin> ./hdfs ec -getPolicy -path /dir/.snapshot/
> {{FileNotFoundException: Path not found: /dir/.snapshot}}
> bin> ./hdfs dfs -ls /dir/.snapshot/
> Found 2 items
> drwxr-xr-x - user group 0 2017-12-05 12:27 /dir/.snapshot/s1
> drwxr-xr-x - user group 0 2017-12-05 12:28 /dir/.snapshot/s2
> *Storagepolicies*
> bin> ./hdfs storagepolicies -getStoragePolicy -path /dir/.snapshot/
> {{The storage policy of /dir/.snapshot/ is unspecified}}
> bin> ./hdfs storagepolicies -getStoragePolicy -path /dir/
> The storage policy of /dir/:
> BlockStoragePolicy{COLD:2, storageTypes=[ARCHIVE], creationFallbacks=[],
> replicationFallbacks=[]}
> *Which is the correct behavior ?*
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