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https://issues.apache.org/jira/browse/HDFS-11481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400741#comment-16400741
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Yongjun Zhang commented on HDFS-11481:
--------------------------------------
HDFS-10997 code change:
{code}
static SnapshotDiffReport getSnapshotDiffReport(FSDirectory fsd,
SnapshotManager snapshotManager, String path,
String fromSnapshot, String toSnapshot) throws IOException {
SnapshotDiffReport diffs;
final FSPermissionChecker pc = fsd.getPermissionChecker();
fsd.readLock();
try {
INodesInPath iip = fsd.resolvePath(pc, path, DirOp.READ); <======
if (fsd.isPermissionEnabled()) {
checkSubtreeReadPermission(fsd, pc, path, fromSnapshot);
checkSubtreeReadPermission(fsd, pc, path, toSnapshot);
}
diffs = snapshotManager.diff(iip, path, fromSnapshot, toSnapshot);
} finally {
fsd.readUnlock();
}
return diffs;
}
{code}
> hdfs snapshotDiff /.reserved/raw/... fails on snapshottable directories
> -----------------------------------------------------------------------
>
> Key: HDFS-11481
> URL: https://issues.apache.org/jira/browse/HDFS-11481
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.6.0
> Reporter: Mavin Martin
> Assignee: Mavin Martin
> Priority: Minor
> Attachments: HDFS-11481-branch-2.6.0.001.patch, HDFS-11481.001.patch,
> HDFS-11481.002.patch
>
>
> Successful command:
> {code}
> #> hdfs snapshotDiff /tmp/dir s1 s2
> Difference between snapshot s1 and snapshot s2 under directory /tmp/dir:
> M .
> + ./file1.txt
> {code}
> Unsuccessful command:
> {code}
> #> hdfs snapshotDiff /.reserved/raw/tmp/dir s1 s2
> snapshotDiff: Directory does not exist: /.reserved/raw/tmp/dir
> {code}
> Prefixing with raw path should run successfully and return same output.
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