HBASE-23359 RS going down with NPE when splitting a region with compa…

[brfrn169]

…ction disabled in branch-1

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 33s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
-0 ⚠️	test4tests	0m 0s	The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
		_ branch-1 Compile Tests _
+1 💚	mvninstall	8m 42s	branch-1 passed
+1 💚	compile	0m 39s	branch-1 passed with JDK v1.8.0_232
+1 💚	compile	0m 49s	branch-1 passed with JDK v1.7.0_242
+1 💚	checkstyle	1m 46s	branch-1 passed
+1 💚	shadedjars	3m 10s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 37s	branch-1 passed with JDK v1.8.0_232
+1 💚	javadoc	0m 42s	branch-1 passed with JDK v1.7.0_242
+0 🆗	spotbugs	3m 2s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	3m 0s	branch-1 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 6s	the patch passed
+1 💚	compile	0m 40s	the patch passed with JDK v1.8.0_232
+1 💚	javac	0m 40s	the patch passed
+1 💚	compile	0m 48s	the patch passed with JDK v1.7.0_242
+1 💚	javac	0m 48s	the patch passed
+1 💚	checkstyle	1m 43s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	shadedjars	3m 4s	patch has no errors when building our shaded downstream artifacts.
+1 💚	hadoopcheck	5m 17s	Patch does not cause any errors with Hadoop 2.8.5 2.9.2.
+1 💚	javadoc	0m 31s	the patch passed with JDK v1.8.0_232
+1 💚	javadoc	0m 42s	the patch passed with JDK v1.7.0_242
+1 💚	findbugs	3m 7s	the patch passed
		_ Other Tests _
+1 💚	unit	121m 30s	hbase-server in the patch passed.
+1 💚	asflicense	0m 26s	The patch does not generate ASF License warnings.
		163m 40s

Subsystem	Report/Notes
Docker	Client=19.03.4 Server=19.03.4 base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-899/1/artifact/out/Dockerfile
GITHUB PR	#899
Optional Tests	dupname asflicense javac javadoc unit spotbugs findbugs shadedjars hadoopcheck hbaseanti checkstyle compile
uname	Linux eb4cf9dcf24e 4.15.0-70-generic #79-Ubuntu SMP Tue Nov 12 10:36:11 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	/home/jenkins/jenkins-slave/workspace/HBase-PreCommit-GitHub-PR_PR-899/out/precommit/personality/provided.sh
git revision	branch-1 / af2ac03
Default Java	1.7.0_242
Multi-JDK versions	/usr/lib/jvm/zulu-8-amd64:1.8.0_232 /usr/lib/jvm/zulu-7-amd64:1.7.0_242
Test Results	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-899/1/testReport/
Max. process+thread count	3421 (vs. ulimit of 10000)
modules	C: hbase-server U: hbase-server
Console output	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-899/1/console
versions	git=1.9.1 maven=3.0.5 findbugs=3.0.1
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[brfrn169]

Merged. Thank you for reviewing this. @meszibalu@anoopsjohn