HBASE-27029 When HMaster is stopped, the local region cannot be flushed normally

[2005hithlj]

https://issues.apache.org/jira/browse/HBASE-27029

[2005hithlj]

Could you take a look when you have time? @carp84 sir.

[Apache-HBase]

:confetti_ball: +1 overall

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+1 :green_heart:	spotbugs	1m 23s	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-4483/1/artifact/yetus-general-check/output/Dockerfile
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Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti spotless checkstyle compile
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[Apache-HBase]

:broken_heart: -1 overall

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		_ Other Tests _
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		222m 51s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4483/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
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Optional Tests	javac javadoc unit shadedjars compile
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[Apache-HBase]

:confetti_ball: +1 overall

Vote	Subsystem	Runtime	Comment
+0 :ok:	reexec	1m 2s	Docker mode activated.
		_ Prechecks _
+1 :green_heart:	dupname	0m 0s	No case conflicting files found.
+1 :green_heart:	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 :green_heart:	@author	0m 0s	The patch does not contain any @author tags.
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		32m 3s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4483/2/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	https://github.com/apache/hbase/pull/4483
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti spotless checkstyle compile
uname	Linux 5bf44eb33f7c 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 / d57159f31c
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	64 (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-4483/2/console
versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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[2005hithlj]

Could you take a look? sir @carp84.

[Apache9]

IIRC this is intentional, it used to happen that a procedure is blocked on updating meta or something for a very long time so we can not stop HMaster, so we close the cluster connection and related rpc client first, so the procedure will fail soon.