HADOOP-18569. NFS Gateway may release buffer too early

[adoroszlai]

What changes were proposed in this pull request?

cherry-picking df4812d

https://issues.apache.org/jira/browse/HADOOP-18569

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	17m 16s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		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.
			_ trunk Compile Tests _
+1 💚	mvninstall	39m 4s		trunk passed
+1 💚	compile	23m 13s		trunk passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04
+1 💚	compile	20m 25s		trunk passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08
+1 💚	checkstyle	0m 45s		trunk passed
+1 💚	mvnsite	0m 49s		trunk passed
+1 💚	javadoc	0m 50s		trunk passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04
+1 💚	javadoc	0m 45s		trunk passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08
+1 💚	spotbugs	1m 11s		trunk passed
+1 💚	shadedclient	20m 54s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 21s		the patch passed
+1 💚	compile	22m 20s		the patch passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04
+1 💚	javac	22m 20s		the patch passed
+1 💚	compile	20m 37s		the patch passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08
+1 💚	javac	20m 37s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 38s		the patch passed
+1 💚	mvnsite	0m 45s		the patch passed
+1 💚	javadoc	0m 44s		the patch passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04
+1 💚	javadoc	0m 42s		the patch passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08
+1 💚	spotbugs	1m 9s		the patch passed
+1 💚	shadedclient	20m 33s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	1m 2s		hadoop-nfs in the patch passed.
+1 💚	asflicense	1m 1s		The patch does not generate ASF License warnings.
		198m 31s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5212/1/artifact/out/Dockerfile
GITHUB PR	#5212
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 065ae8968491 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 18:16:04 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 078506f
Default Java	Private Build-1.8.0_352-8u352-ga-1~20.04-b08
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_352-8u352-ga-1~20.04-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5212/1/testReport/
Max. process+thread count	560 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-nfs U: hadoop-common-project/hadoop-nfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5212/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[steveloughran]

LGTM
+1