HDFS-16882. RBF: Add cache hit rate metric in MountTableResolver#getDestinationForPath

[hfutatzhanghb]

please see #5276.

[hfutatzhanghb]

hi , @tomscut . i have backport the changes to branch-3.3. please take a look. thanks a lot.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 37s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	40m 44s		branch-3.3 passed
+1 💚	compile	0m 39s		branch-3.3 passed
+1 💚	checkstyle	0m 35s		branch-3.3 passed
+1 💚	mvnsite	0m 46s		branch-3.3 passed
+1 💚	javadoc	1m 8s		branch-3.3 passed
+1 💚	spotbugs	1m 29s		branch-3.3 passed
+1 💚	shadedclient	27m 12s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 42s		the patch passed
+1 💚	compile	0m 30s		the patch passed
+1 💚	javac	0m 30s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 18s		the patch passed
+1 💚	mvnsite	0m 33s		the patch passed
+1 💚	javadoc	0m 51s		the patch passed
+1 💚	spotbugs	1m 17s		the patch passed
+1 💚	shadedclient	26m 38s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	17m 16s		hadoop-hdfs-rbf in the patch passed.
+1 💚	asflicense	0m 39s		The patch does not generate ASF License warnings.
		124m 40s

Subsystem	Report/Notes
Docker	ClientAPI=1.42 ServerAPI=1.42 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/1/artifact/out/Dockerfile
GITHUB PR	#5423
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 36ffdcad9afc 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 18:16:04 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / b721f8d
Default Java	Private Build-1.8.0_352-8u352-ga-1~18.04-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/1/testReport/
Max. process+thread count	2736 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs-rbf U: hadoop-hdfs-project/hadoop-hdfs-rbf
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[tomscut]

LGTM.

[hfutatzhanghb]

@ayushtkn , Sir, could you please help me review this code~ thanks.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	11m 17s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	40m 5s		branch-3.3 passed
+1 💚	compile	0m 38s		branch-3.3 passed
+1 💚	checkstyle	0m 35s		branch-3.3 passed
+1 💚	mvnsite	0m 44s		branch-3.3 passed
+1 💚	javadoc	1m 7s		branch-3.3 passed
+1 💚	spotbugs	1m 33s		branch-3.3 passed
+1 💚	shadedclient	24m 32s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 33s		the patch passed
+1 💚	compile	0m 30s		the patch passed
+1 💚	javac	0m 30s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 19s		the patch passed
+1 💚	mvnsite	0m 34s		the patch passed
+1 💚	javadoc	0m 51s		the patch passed
+1 💚	spotbugs	1m 18s		the patch passed
+1 💚	shadedclient	23m 59s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	17m 8s		hadoop-hdfs-rbf in the patch passed.
+1 💚	asflicense	0m 37s		The patch does not generate ASF License warnings.
		128m 25s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/2/artifact/out/Dockerfile
GITHUB PR	#5423
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 356cbf6f6e57 4.15.0-206-generic #217-Ubuntu SMP Fri Feb 3 19:10:13 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / b721f8d
Default Java	Private Build-1.8.0_362-8u372-gaus1-0ubuntu118.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/2/testReport/
Max. process+thread count	2718 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs-rbf U: hadoop-hdfs-project/hadoop-hdfs-rbf
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5423/2/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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