HBASE-29783 Fix flaky TestVerifyBucketCacheFile.testRetrieveFromFile test

[wchevreuil]

TestVerifyBucketCacheFile is on the flaky list for master branch, with testRetrieveFromFile failing the check scenario where the index (backingMap) is recoverable, but not the cache file itself. I believe this is because on line #141 we are waiting until bucket cache is initialised (cacheState == ENABLED), however, in cases where the backingMap and the cache file are inconsistent, we perform a background validation of the backingMap, even after the cache is in ENABLED state.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 29s		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 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ master Compile Tests _
+1 💚	mvninstall	3m 37s		master passed
+1 💚	compile	3m 34s		master passed
+1 💚	checkstyle	1m 1s		master passed
+1 💚	spotbugs	1m 40s		master passed
+1 💚	spotless	0m 51s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 5s		the patch passed
+1 💚	compile	3m 33s		the patch passed
+1 💚	javac	3m 33s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 0s		the patch passed
+1 💚	spotbugs	1m 44s		the patch passed
+1 💚	hadoopcheck	11m 38s		Patch does not cause any errors with Hadoop 3.3.6 3.4.1.
+1 💚	spotless	1m 0s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 16s		The patch does not generate ASF License warnings.
		41m 47s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7561/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#7561
Optional Tests	dupname asflicense javac spotbugs checkstyle codespell detsecrets compile hadoopcheck hbaseanti spotless
uname	Linux 68c2eb351d7a 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / da41c53
Default Java	Eclipse Adoptium-17.0.11+9
Max. process+thread count	85 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7561/1/console
versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 27s		Docker mode activated.
-0 ⚠️	yetus	0m 3s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ master Compile Tests _
+1 💚	mvninstall	3m 42s		master passed
+1 💚	compile	1m 1s		master passed
+1 💚	javadoc	0m 30s		master passed
+1 💚	shadedjars	6m 14s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 11s		the patch passed
+1 💚	compile	1m 0s		the patch passed
+1 💚	javac	1m 0s		the patch passed
+1 💚	javadoc	0m 28s		the patch passed
+1 💚	shadedjars	6m 11s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	216m 55s		hbase-server in the patch passed.
		244m 31s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7561/1/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#7561
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 2078b77d4466 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / da41c53
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7561/1/testReport/
Max. process+thread count	4587 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7561/1/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

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[petersomogyi]

lgtm