HADOOP-18348. Change hadoop_start_daemon function $ to BASHPID

[Pr-Jiang]

Description of PR

https://issues.apache.org/jira/browse/HADOOP-18348

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]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 48s		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.
+0 🆗	shelldocs	0m 0s		Shelldocs 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	40m 51s		trunk passed
+1 💚	mvnsite	1m 37s		trunk passed
+1 💚	shadedclient	22m 23s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 5s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	1m 23s		the patch passed
+1 💚	shellcheck	0m 3s		No new issues.
+1 💚	shadedclient	22m 12s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	1m 47s		hadoop-common in the patch passed.
+1 💚	asflicense	0m 43s		The patch does not generate ASF License warnings.
		95m 1s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4589/1/artifact/out/Dockerfile
GITHUB PR	#4589
Optional Tests	dupname asflicense mvnsite unit codespell detsecrets shellcheck shelldocs
uname	Linux 89d937a0ab5d 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24 17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 6ae1572
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4589/1/testReport/
Max. process+thread count	633 (vs. ulimit of 5500)
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-4589/1/console
versions	git=2.25.1 maven=3.6.3 shellcheck=0.7.0
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.