HDFS-17420. EditLogTailer and FSEditLogLoader support FGL

[ZanderXu]

EditLogTailer and FSEditLogLoader support FGL.

Both EditLogTailer and FSEditLogLoader need Global lock.

[RocMarshal]

Thanks @ZanderXu for the pr.
LGTM +1.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 21s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	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.
			_ HDFS-17384 Compile Tests _
+1 💚	mvninstall	32m 41s		HDFS-17384 passed
+1 💚	compile	0m 47s		HDFS-17384 passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	compile	0m 43s		HDFS-17384 passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	checkstyle	0m 40s		HDFS-17384 passed
+1 💚	mvnsite	0m 45s		HDFS-17384 passed
+1 💚	javadoc	0m 43s		HDFS-17384 passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	javadoc	1m 7s		HDFS-17384 passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	spotbugs	1m 53s		HDFS-17384 passed
+1 💚	shadedclient	21m 34s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 35s		the patch passed
+1 💚	compile	0m 38s		the patch passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	javac	0m 38s		the patch passed
+1 💚	compile	0m 36s		the patch passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	javac	0m 36s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 30s		the patch passed
+1 💚	mvnsite	0m 37s		the patch passed
+1 💚	javadoc	0m 30s		the patch passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	javadoc	1m 2s		the patch passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	spotbugs	1m 42s		the patch passed
+1 💚	shadedclient	21m 11s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	204m 40s		hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 30s		The patch does not generate ASF License warnings.
		295m 8s

Subsystem	Report/Notes
Docker	ClientAPI=1.45 ServerAPI=1.45 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6679/1/artifact/out/Dockerfile
GITHUB PR	#6679
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 84bdbb5307df 5.15.0-94-generic #104-Ubuntu SMP Tue Jan 9 15:25:40 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	HDFS-17384 / 806a5f1
Default Java	Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6679/1/testReport/
Max. process+thread count	4439 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6679/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[ferhui]

@ZanderXu Thanks for contribution. @huangzhaobo99 @RocMarshal Thanks for review. Merged.