Incorrect desired split count printed in TezSplitGrouper when run on S3

[Darkness303]

I was a bit confused when i saw the log print below .Through calculation and analysis ,it is found that the information is not printed correctly because the parameter assignment time is too early.

After modification:

PS: Desired splits * Desired splitLength = totalLength

[jteagles]

@rbalamohan, could you take a look at this PR related to TezSplitGrouper when run on S3

[jteagles]

@Darkness303, I have updated the PR title to better reach a reviewer. Can you confirm the title is correct and whether this occurs or S3 or another file system?

[tez-yetus]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Comment
+0 :ok:	reexec	16m 13s	Docker mode activated.
		_ Prechecks _
+1 :green_heart:	dupname	0m 0s	No case conflicting files found.
+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.
		_ master Compile Tests _
+1 :green_heart:	mvninstall	13m 41s	master passed
+1 :green_heart:	compile	0m 28s	master passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 :green_heart:	compile	0m 26s	master passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 :green_heart:	checkstyle	0m 54s	master passed
+1 :green_heart:	javadoc	0m 36s	master passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 :green_heart:	javadoc	0m 23s	master passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+0 :ok:	spotbugs	1m 10s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 :green_heart:	findbugs	1m 8s	master passed
		_ Patch Compile Tests _
+1 :green_heart:	mvninstall	0m 19s	the patch passed
+1 :green_heart:	compile	0m 19s	the patch passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 :green_heart:	javac	0m 19s	the patch passed
+1 :green_heart:	compile	0m 17s	the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 :green_heart:	javac	0m 17s	the patch passed
+1 :green_heart:	checkstyle	0m 10s	the patch passed
+1 :green_heart:	whitespace	0m 0s	The patch has no whitespace issues.
+1 :green_heart:	javadoc	0m 16s	the patch passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 :green_heart:	javadoc	0m 14s	the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 :green_heart:	findbugs	0m 45s	the patch passed
		_ Other Tests _
+1 :green_heart:	unit	1m 16s	tez-mapreduce in the patch passed.
+1 :green_heart:	asflicense	0m 12s	The patch does not generate ASF License warnings.
		38m 27s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-76/1/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/tez/pull/76
Optional Tests	dupname asflicense javac javadoc unit spotbugs findbugs checkstyle compile
uname	Linux 77286d283734 4.15.0-163-generic #171-Ubuntu SMP Fri Nov 5 11:55:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/tez.sh
git revision	master / 6d7ef203c
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-76/1/testReport/
Max. process+thread count	222 (vs. ulimit of 5500)
modules	C: tez-mapreduce U: tez-mapreduce
Console output	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-76/1/console
versions	git=2.25.1 maven=3.6.3 findbugs=3.0.1
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[Darkness303]

@jteagles THS,The title is better than before, but it was running xfs file System and using ORC columnar Storage.