HBASE-27054 testRegionReplicasOnLargeCluster flake fix

[d-c-manning]

HBASE-27054

Testing locally, I was able to see 100% pass rate with 15 second maxRunningTime after making these changes. So I changed to inherit from StochasticBalancerTestBase instead of StochasticBalancerTestBase2. The major difference in StochasticBalancerTestBase2 for the purposes of this test is a 180 seconds maxRunningTime for the balancer, which should now be wasteful for this test. We can use the default 30 seconds, which we will inherit by using StochasticBalancerTestBase.

[Apache-HBase]

🎊 +1 overall

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+0 🆗	reexec	0m 30s	Docker mode activated.
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+1 💚	mvninstall	2m 27s	master passed
+1 💚	compile	0m 23s	master passed
+1 💚	checkstyle	0m 10s	master passed
+1 💚	spotless	0m 43s	branch has no errors when running spotless:check.
+1 💚	spotbugs	0m 24s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 9s	the patch passed
+1 💚	compile	0m 21s	the patch passed
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+1 💚	checkstyle	0m 9s	the patch passed
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+1 💚	hadoopcheck	11m 23s	Patch does not cause any errors with Hadoop 3.1.2 3.2.2 3.3.1.
+1 💚	spotless	0m 40s	patch has no errors when running spotless:check.
+1 💚	spotbugs	0m 27s	the patch passed
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+1 💚	asflicense	0m 10s	The patch does not generate ASF License warnings.
		25m 12s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#4454
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti spotless checkstyle compile
uname	Linux cdcb91b6f280 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / c7eb30d
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	64 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/console
versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 39s	Docker mode activated.
-0 ⚠️	yetus	0m 2s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	4m 8s	master passed
+1 💚	compile	0m 12s	master passed
+1 💚	shadedjars	3m 55s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 12s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 6s	the patch passed
+1 💚	compile	0m 11s	the patch passed
+1 💚	javac	0m 11s	the patch passed
+1 💚	shadedjars	3m 54s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 9s	the patch passed
		_ Other Tests _
+1 💚	unit	8m 48s	hbase-balancer in the patch passed.
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Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#4454
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 6b57ec425c3c 5.4.0-1025-aws #25~18.04.1-Ubuntu SMP Fri Sep 11 12:03:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / c7eb30d
Default Java	AdoptOpenJDK-1.8.0_282-b08
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/testReport/
Max. process+thread count	163 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/console
versions	git=2.17.1 maven=3.6.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 40s	Docker mode activated.
-0 ⚠️	yetus	0m 3s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	4m 11s	master passed
+1 💚	compile	0m 12s	master passed
+1 💚	shadedjars	3m 50s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 13s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 26s	the patch passed
+1 💚	compile	0m 12s	the patch passed
+1 💚	javac	0m 12s	the patch passed
+1 💚	shadedjars	3m 45s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 10s	the patch passed
		_ Other Tests _
+1 💚	unit	9m 7s	hbase-balancer in the patch passed.
		25m 44s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#4454
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 2a438d2b7b6f 5.4.0-1071-aws #76~18.04.1-Ubuntu SMP Mon Mar 28 17:49:57 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / c7eb30d
Default Java	AdoptOpenJDK-11.0.10+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/testReport/
Max. process+thread count	194 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4454/1/console
versions	git=2.17.1 maven=3.6.3
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[apurtell]

As I mentioned on the JIRA I can repro this pretty readily in the environment I have set up for making a pass over these unit tests. Let me apply this locally there and observe. Thanks @d-c-manning

[apurtell]

Not able to reproduce after 5 runs of all balancer tests, waiting until 10...

[apurtell]

No failures.

[apurtell]

Thanks @d-c-manning !