HDFS-16187. SnapshotDiff behaviour with Xattrs and Acls is not consistent across NN restarts with checkpointing (#3340)

[jojochuang]

(cherry picked from commit 356ebbb)

Conflicts:
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestEncryptionZones.java

Change-Id: If76fd0d77fafc90fe2f2c19ab1d0c43a58510f6b

Description of PR

How was this patch tested?

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[jojochuang]

Only a few trivial conflicts in import list in the test code.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	9m 54s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 2 new or modified test files.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	32m 49s		branch-3.3 passed
+1 💚	compile	1m 12s		branch-3.3 passed
+1 💚	checkstyle	0m 48s		branch-3.3 passed
+1 💚	mvnsite	1m 20s		branch-3.3 passed
+1 💚	javadoc	1m 26s		branch-3.3 passed
+1 💚	spotbugs	3m 12s		branch-3.3 passed
+1 💚	shadedclient	27m 13s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 12s		the patch passed
+1 💚	compile	1m 7s		the patch passed
+1 💚	javac	1m 7s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 43s		hadoop-hdfs-project/hadoop-hdfs: The patch generated 0 new + 67 unchanged - 1 fixed = 67 total (was 68)
+1 💚	mvnsite	1m 21s		the patch passed
+1 💚	javadoc	1m 19s		the patch passed
+1 💚	spotbugs	3m 18s		the patch passed
+1 💚	shadedclient	27m 37s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	207m 57s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		320m 22s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.datanode.TestDirectoryScanner

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3640/1/artifact/out/Dockerfile
GITHUB PR	#3640
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 2b4786ab80cd 4.15.0-147-generic #151-Ubuntu SMP Fri Jun 18 19:21:19 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / 6a5b766
Default Java	Private Build-1.8.0_292-8u292-b10-0ubuntu1~18.04-b10
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3640/1/testReport/
Max. process+thread count	2406 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3640/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[jojochuang]

TestDirectoryScanner not reproucible in my local tree. Will merge later.