YARN-6862. Nodemanager resource usage metrics sometimes are negative.…

[brumi1024]

… Contributed by Benjamin Teke

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?

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 54s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		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 4 new or modified test files.
			_ branch-3.2 Compile Tests _
+1 💚	mvninstall	28m 53s		branch-3.2 passed
+1 💚	compile	1m 1s		branch-3.2 passed
+1 💚	checkstyle	0m 25s		branch-3.2 passed
+1 💚	mvnsite	0m 37s		branch-3.2 passed
+1 💚	javadoc	0m 29s		branch-3.2 passed
+1 💚	spotbugs	1m 13s		branch-3.2 passed
+1 💚	shadedclient	15m 2s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 35s		the patch passed
+1 💚	compile	0m 54s		the patch passed
+1 💚	javac	0m 54s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 19s		the patch passed
+1 💚	mvnsite	0m 29s		the patch passed
+1 💚	javadoc	0m 20s		the patch passed
+1 💚	spotbugs	1m 17s		the patch passed
+1 💚	shadedclient	16m 31s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	19m 21s		hadoop-yarn-server-nodemanager in the patch passed.
+1 💚	asflicense	0m 27s		The patch does not generate ASF License warnings.
		89m 8s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3771/1/artifact/out/Dockerfile
GITHUB PR	#3771
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 507c50a1c603 4.15.0-163-generic #171-Ubuntu SMP Fri Nov 5 11:55:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.2 / 6711df1
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-3771/1/testReport/
Max. process+thread count	332 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3771/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[szilard-nemeth]

Thanks @brumi1024 ,
Patch LGTM, committed to branch-3.2