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https://issues.apache.org/jira/browse/HDFS-16187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HDFS-16187:
-----------------------------------
Fix Version/s: 3.3.2
> SnapshotDiff behaviour with Xattrs and Acls is not consistent across NN
> restarts with checkpointing
> ---------------------------------------------------------------------------------------------------
>
> Key: HDFS-16187
> URL: https://issues.apache.org/jira/browse/HDFS-16187
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: snapshots
> Reporter: Srinivasu Majeti
> Assignee: Shashikant Banerjee
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.2
>
> Time Spent: 5h
> Remaining Estimate: 0h
>
> The below test shows the snapshot diff between across snapshots is not
> consistent with Xattr(EZ here settinh the Xattr) across NN restarts with
> checkpointed FsImage.
> {code:java}
> @Test
> public void testEncryptionZonesWithSnapshots() throws Exception {
> final Path snapshottable = new Path("/zones");
> fsWrapper.mkdir(snapshottable, FsPermission.getDirDefault(),
> true);
> dfsAdmin.allowSnapshot(snapshottable);
> dfsAdmin.createEncryptionZone(snapshottable, TEST_KEY, NO_TRASH);
> fs.createSnapshot(snapshottable, "snap1");
> SnapshotDiffReport report =
> fs.getSnapshotDiffReport(snapshottable, "snap1", "");
> Assert.assertEquals(0, report.getDiffList().size());
> report =
> fs.getSnapshotDiffReport(snapshottable, "snap1", "");
> System.out.println(report);
> Assert.assertEquals(0, report.getDiffList().size());
> fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
> fs.saveNamespace();
> fs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
> cluster.restartNameNode(true);
> report =
> fs.getSnapshotDiffReport(snapshottable, "snap1", "");
> Assert.assertEquals(0, report.getDiffList().size());
> }{code}
> {code:java}
> Pre Restart:
> Difference between snapshot snap1 and current directory under directory
> /zones:
> Post Restart:
> Difference between snapshot snap1 and current directory under directory
> /zones:
> M .{code}
> The side effect of this behavior is : distcp with snapshot diff would fail
> with below error complaining that target cluster has some data changed .
> {code:java}
> WARN tools.DistCp: The target has been modified since snapshot xxxxx
> {code}
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