HDFS-15677. TestRouterRpcMultiDestination#testGetCachedDatanodeReportfails on trunk.

[iwasakims]

https://issues.apache.org/jira/browse/HDFS-15677

Since heartbeatExpireInterval and assertion timeout of DN removal has the same value (5000 ms), the test fails intermittently. Updating the heartbeatExpireInterval and assertion timeout worked for me.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 30s		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 💚		0m 0s	test4tests	The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	32m 34s		trunk passed
+1 💚	compile	0m 41s		trunk passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	compile	0m 36s		trunk passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+1 💚	checkstyle	0m 27s		trunk passed
+1 💚	mvnsite	0m 40s		trunk passed
+1 💚	shadedclient	16m 20s		branch has no errors when building and testing our client artifacts.
+1 💚	javadoc	0m 40s		trunk passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javadoc	0m 54s		trunk passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+0 🆗	spotbugs	1m 15s		Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	1m 14s		trunk passed
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 33s		the patch passed
+1 💚	compile	0m 33s		the patch passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javac	0m 33s		the patch passed
+1 💚	compile	0m 29s		the patch passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+1 💚	javac	0m 29s		the patch passed
+1 💚	checkstyle	0m 17s		the patch passed
+1 💚	mvnsite	0m 32s		the patch passed
+1 💚	whitespace	0m 0s		The patch has no whitespace issues.
+1 💚	shadedclient	15m 8s		patch has no errors when building and testing our client artifacts.
+1 💚	javadoc	0m 34s		the patch passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javadoc	0m 52s		the patch passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+1 💚	findbugs	1m 14s		the patch passed
			_ Other Tests _
+1 💚	unit	8m 34s		hadoop-hdfs-rbf in the patch passed.
+1 💚	asflicense	0m 32s		The patch does not generate ASF License warnings.
		86m 58s

Subsystem	Report/Notes
Docker	ClientAPI=1.40 ServerAPI=1.40 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2503/1/artifact/out/Dockerfile
GITHUB PR	#2503
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux f39134cbd1e9 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 44910b5
Default Java	Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2503/1/testReport/
Max. process+thread count	3038 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs-rbf U: hadoop-hdfs-project/hadoop-hdfs-rbf
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2503/1/console
versions	git=2.17.1 maven=3.6.0 findbugs=4.0.6
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[iwasakims]

Thanks, @goiri. I merged this.