HADOOP-19863. Incorrect Vectored IO metrics from Local Filesystem.

[steveloughran]

Description of PR

Update filesystem and io statistics with bytes read from
successful vector reads.

How was this patch tested?

extended contract tests.

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[steveloughran]

Cannot invoke "org.apache.hadoop.fs.FileSystem.openFile(org.apache.hadoop.fs.Path)" because "fs" is null

fwiw saw that on ide test runs, but not cli.

also, should do this check through LocalFS, where raw local is behind the scenes

[steveloughran]

if this is failing, then

1. bad counting logic
2. the number of bytes read really is different from that requested.

#2 isn't necessarily wrong as we need to round up for crc checking and with coalescing, merge ranges.

I'll just assert the number goes up and not worry about the exact number

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 23s		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 appears to include 3 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	28m 58s		trunk passed
+1 💚	compile	8m 46s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	compile	8m 58s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	checkstyle	0m 50s		trunk passed
+1 💚	mvnsite	1m 13s		trunk passed
+1 💚	javadoc	0m 51s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 52s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	1m 48s		trunk passed
+1 💚	shadedclient	16m 44s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 42s		the patch passed
+1 💚	compile	8m 15s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javac	8m 15s		the patch passed
+1 💚	compile	9m 0s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	javac	9m 0s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 52s		the patch passed
+1 💚	mvnsite	1m 11s		the patch passed
+1 💚	javadoc	0m 52s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 53s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	1m 55s		the patch passed
+1 💚	shadedclient	17m 13s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	17m 41s		hadoop-common in the patch passed.
+1 💚	asflicense	0m 48s		The patch does not generate ASF License warnings.
		129m 56s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8447/4/artifact/out/Dockerfile
GITHUB PR	#8447
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux ca463d92f4f9 5.15.0-173-generic #183-Ubuntu SMP Fri Mar 6 13:29:34 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 06bd286
Default Java	Ubuntu-17.0.18+8-Ubuntu-124.04.1
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04 /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8447/4/testReport/
Max. process+thread count	1279 (vs. ulimit of 10000)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8447/4/console
versions	git=2.43.0 maven=3.9.11 spotbugs=4.9.7
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