MAPREDUCE-7269. TestNetworkedJob fails

[aajisaka]

JIRA: https://issues.apache.org/jira/browse/MAPREDUCE-7269

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	30m 8s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+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.
		_ trunk Compile Tests _
+1 💚	mvninstall	22m 28s	trunk passed
+1 💚	compile	0m 28s	trunk passed
+1 💚	checkstyle	0m 23s	trunk passed
+1 💚	mvnsite	0m 32s	trunk passed
+1 💚	shadedclient	16m 20s	branch has no errors when building and testing our client artifacts.
+1 💚	javadoc	0m 22s	trunk passed
+0 🆗	spotbugs	0m 43s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	0m 41s	trunk passed
		_ Patch Compile Tests _
+1 💚	mvninstall	0m 31s	the patch passed
+1 💚	compile	0m 23s	the patch passed
+1 💚	javac	0m 23s	the patch passed
+1 💚	checkstyle	0m 18s	the patch passed
+1 💚	mvnsite	0m 27s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	shadedclient	15m 25s	patch has no errors when building and testing our client artifacts.
+1 💚	javadoc	0m 18s	the patch passed
+1 💚	findbugs	0m 45s	the patch passed
		_ Other Tests _
+1 💚	unit	122m 44s	hadoop-mapreduce-client-jobclient in the patch passed.
-1 ❌	asflicense	0m 39s	The patch generated 1 ASF License warnings.
		214m 20s

Subsystem	Report/Notes
Docker	Client=19.03.8 Server=19.03.8 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1940/1/artifact/out/Dockerfile
GITHUB PR	#1940
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux 94a0330bcf9b 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / b89d875
Default Java	1.8.0_242
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1940/1/testReport/
asflicense	https://builds.apache.org/job/hadoop-multibranch/job/PR-1940/1/artifact/out/patch-asflicense-problems.txt
Max. process+thread count	1213 (vs. ulimit of 5500)
modules	C: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient U: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1940/1/console
versions	git=2.7.4 maven=3.3.9 findbugs=3.1.0-RC1
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[aajisaka]

Thanks @wilfred-s for your review in the JIRA.