[KAFKA-3281] Improve message of stop scripts when no processes are running

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.10.0.0
• Fix Version/s: 0.10.1.0
• Assignee: Sasaki Toru
• Reporter: Sasaki Toru
• Created: 25/Feb/16 08:44
• Updated: 23/Sep/16 23:12
• Resolved: 23/Sep/16 23:12

Description

Stop scritps such as kafka-server-stop.sh log messages of kill command's error when processes aren't running.

Example(Brokers are not running):

$ bin/kafka-server-stop.sh 
kill: invalid argument S

Usage:
 kill [options] <pid> [...]

Options:
 <pid> [...]            send signal to every <pid> listed
 -<signal>, -s, --signal <signal>
                        specify the <signal> to be sent
 -l, --list=[<signal>]  list all signal names, or convert one to a name
 -L, --table            list all signal names in a nice table

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see kill(1).