[HADOOP-18348] Echo java process's parent pid to the pid file intermediate state

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.3.1, 3.3.2, 3.3.3
• Fix Version/s: 3.3.1, 3.3.2, 3.3.3
• Component/s: common
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: jiangrui
• Created: 19/Jul/22 08:03
• Updated: 22/Jul/22 02:51

Description

In hadoop-function.sh file，there is hadoop_start_daemon and hadoop_start_daemon_wrapper functions.

hadoop_start_daemon_wrapper invoke hadoop_start_daemon and put it to background.

 

In  hadoop_start_daemon function, echo $$ > pidfile，cause this scenario

because hadoop_start_daemon is in a subshell by ampersand, and $ expands to the process ID of the current shell, not the subshell.

 

Issue Links

• links to: GitHub Pull Request #4589