HADOOP-18362. Solve ZKFailoverController throw ambiguous exception

[MEILIDEKCL]

Description of PR

We modified the Groups.java file, manually checked the cache validity time in the initialization function of this file, and then threw an exception at an earlier position. Because what is thrown in ZKFailoverController.java is the cause of the exception information, which is RuntimeException.getCause(). Also, the cache validity time is used when creating a cacheBuilder. However, the check information in this cacheBuilder class is imperfect, so it leads to imperfection of the thrown information.

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 57s		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-2.10 Compile Tests _
+1 💚	mvninstall	16m 10s		branch-2.10 passed
+1 💚	compile	13m 23s		branch-2.10 passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	compile	11m 25s		branch-2.10 passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	checkstyle	1m 9s		branch-2.10 passed
+1 💚	mvnsite	1m 38s		branch-2.10 passed
+1 💚	javadoc	1m 42s		branch-2.10 passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javadoc	1m 28s		branch-2.10 passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
-1 ❌	spotbugs	2m 48s	/branch-spotbugs-hadoop-common-project_hadoop-common-warnings.html	hadoop-common-project/hadoop-common in branch-2.10 has 2 extant spotbugs warnings.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 52s		the patch passed
+1 💚	compile	12m 57s		the patch passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javac	12m 57s		the patch passed
+1 💚	compile	12m 21s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	javac	12m 21s		the patch passed
-1 ❌	blanks	0m 0s	/blanks-eol.txt	The patch has 1 line(s) that end in blanks. Use git apply --whitespace=fix <<patch_file>>. Refer https://git-scm.com/docs/git-apply
-0 ⚠️	checkstyle	0m 57s	/results-checkstyle-hadoop-common-project_hadoop-common.txt	hadoop-common-project/hadoop-common: The patch generated 1 new + 27 unchanged - 0 fixed = 28 total (was 27)
+1 💚	mvnsite	1m 40s		the patch passed
+1 💚	javadoc	1m 23s		the patch passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javadoc	1m 17s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	spotbugs	2m 24s		the patch passed
			_ Other Tests _
-1 ❌	unit	10m 20s	/patch-unit-hadoop-common-project_hadoop-common.txt	hadoop-common in the patch passed.
+1 💚	asflicense	1m 26s		The patch does not generate ASF License warnings.
		103m 14s

Reason	Tests
Failed junit tests	hadoop.util.TestReadWriteDiskValidator

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4643/1/artifact/out/Dockerfile
GITHUB PR	#4643
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 7c65a0825c65 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-2.10 / f0906a7
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Multi-JDK versions	/usr/lib/jvm/zulu-7-amd64:Azul Systems, Inc.-1.7.0_262-b10 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4643/1/testReport/
Max. process+thread count	1368 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4643/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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