HDFS-17541. Support msync requests to a separate RPC Server

[2005hithlj]

https://issues.apache.org/jira/browse/HDFS-17541

Description of PR

How was this patch tested?

For code changes:

• [ ] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• [ ] If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	17m 29s		Docker mode activated.
			_ Prechecks _
+1 :green_heart:	dupname	0m 0s		No case conflicting files found.
+0 :ok:	codespell	0m 0s		codespell was not available.
+0 :ok:	detsecrets	0m 0s		detect-secrets was not available.
+0 :ok:	xmllint	0m 0s		xmllint was not available.
+1 :green_heart:	@author	0m 0s		The patch does not contain any @author tags.
-1 :x:	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.
			_ trunk Compile Tests _
+0 :ok:	mvndep	14m 28s		Maven dependency ordering for branch
+1 :green_heart:	mvninstall	37m 7s		trunk passed
+1 :green_heart:	compile	6m 16s		trunk passed with JDK Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2
+1 :green_heart:	compile	5m 57s		trunk passed with JDK Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
+1 :green_heart:	checkstyle	1m 32s		trunk passed
+1 :green_heart:	mvnsite	2m 25s		trunk passed
+1 :green_heart:	javadoc	1m 52s		trunk passed with JDK Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2
+1 :green_heart:	javadoc	2m 27s		trunk passed with JDK Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
+1 :green_heart:	spotbugs	5m 57s		trunk passed
+1 :green_heart:	shadedclient	41m 21s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 :ok:	mvndep	0m 33s		Maven dependency ordering for patch
+1 :green_heart:	mvninstall	2m 9s		the patch passed
+1 :green_heart:	compile	6m 15s		the patch passed with JDK Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2
+1 :green_heart:	javac	6m 15s		the patch passed
+1 :green_heart:	compile	5m 54s		the patch passed with JDK Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
+1 :green_heart:	javac	5m 54s		the patch passed
+1 :green_heart:	blanks	0m 0s		The patch has no blanks issues.
-0 :warning:	checkstyle	1m 21s	/results-checkstyle-hadoop-hdfs-project.txt	hadoop-hdfs-project: The patch generated 14 new + 334 unchanged - 0 fixed = 348 total (was 334)
+1 :green_heart:	mvnsite	2m 6s		the patch passed
+1 :green_heart:	javadoc	1m 35s		the patch passed with JDK Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2
+1 :green_heart:	javadoc	2m 18s		the patch passed with JDK Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
+1 :green_heart:	spotbugs	6m 5s		the patch passed
+1 :green_heart:	shadedclient	41m 37s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 :green_heart:	unit	2m 24s		hadoop-hdfs-client in the patch passed.
-1 :x:	unit	266m 32s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 :green_heart:	asflicense	0m 51s		The patch does not generate ASF License warnings.
		475m 1s

Reason	Tests
Failed junit tests	hadoop.tools.TestHdfsConfigFields
	hadoop.hdfs.TestRollingUpgrade
	hadoop.hdfs.server.namenode.ha.TestMultiObserverNode
	hadoop.hdfs.server.namenode.ha.TestObserverNode
	hadoop.hdfs.server.namenode.ha.TestDelegationTokensWithHA
	hadoop.hdfs.server.blockmanagement.TestDatanodeManager
	hadoop.hdfs.server.namenode.ha.TestObserverReadProxyProvider
	hadoop.hdfs.TestStateAlignmentContextWithHA
	hadoop.hdfs.server.namenode.ha.TestConsistentReadsObserver
	hadoop.hdfs.server.balancer.TestBalancerWithHANameNodes

Subsystem	Report/Notes
Docker	ClientAPI=1.45 ServerAPI=1.45 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6899/1/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/6899
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets xmllint
uname	Linux 74b0b510459e 5.15.0-107-generic #117-Ubuntu SMP Fri Apr 26 12:26:49 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / ac02727dd12126fb9a6e139640744f6269fe1842
Default Java	Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6899/1/testReport/
Max. process+thread count	2859 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6899/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[whbing]

@2005hithlj Hi, do you have plans to continue pushing this PR forward ?

[github-actions[bot]]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable. If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again. Thanks all for your contribution.