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https://issues.apache.org/jira/browse/KAFKA-10272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mickael Maison resolved KAFKA-10272.
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Fix Version/s: 2.7.0
Resolution: Fixed
> kafka-server-stop.sh fails on IBM i
> -----------------------------------
>
> Key: KAFKA-10272
> URL: https://issues.apache.org/jira/browse/KAFKA-10272
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 2.5.0
> Environment: IBM i 7.2
> Reporter: Jesse Gorzinski
> Assignee: Jesse Gorzinski
> Priority: Minor
> Labels: easyfix
> Fix For: 2.7.0
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> On the IBM i platform, the `kafka-server-stop.sh` script always fails with an
> error message "No kafka server to stop"
>
> The underlying cause is because the script relies on the output of `ps ax` to
> determine the pid. More specifically:
> {code:java}
> PIDS=$(ps ax | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk
> '{print $1}')
> {code}
> On IBM i, the ps utility is unconventional and truncates the output with
> these arguments. For instance, here is part of the ps output
> {code:java}
> 584329 - A 0:00 /QOpenSys/QIBM/ProdData/SC1/OpenSSH/sbin/sshd -R
> 584331 - A 0:00
> /QOpenSys/QIBM/ProdData/SC1/OpenSSH/libexec/sftp-serv
> 584332 - A 0:00 /QOpenSys/QIBM/ProdData/SC1/OpenSSH/sbin/sshd -R
> 584334 pts/5 A 0:00 -bash
> 584365 pts/7 A 0:08 java -Xmx512M -Xms512M -server -XX:+UseG1GC
> -XX:MaxGC
> 585353 pts/8 A 0:12 java -Xmx1G -Xms1G -server -XX:+UseG1GC
> -XX:MaxGCPaus
> 585690 pts/9 A 0:00 ps ax
> {code}
>
> Therefore, the resultant grep always comes up empty. When invoked with `ps
> -af`, it gives the whole command (when piped) but sticks in the UID by
> default
> {code:java}
> ps -af
> UID PID PPID C STIME TTY TIME CMD
> jgorzins 585353 583321 0 12:41:07 pts/8 0:41 java -Xmx1G -Xms1G -server
> -XX:+UseG1GC -XX:MaxGCPauseMillis=20 -XX:InitiatingHeapOccupancyPercent=35
> -XX:+ExplicitGCInvokesConcurr
> jgorzins 585817 585794 0 14:44:25 pts/4 0:00 ps -af
> {code}
> So.... the following PID check works for IBM i:
>
> {code:java}
> PIDS=$(ps -af | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk
> '{print $2}')
> {code}
> so, a fix would be (I have verified this):
> {code:java}
> if [[ "OS400" == $(uname -s) ]]; then
> PIDS=$(ps -af | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk
> '{print $2}')
> else
> PIDS=$(ps ax | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk
> '{print $1}')
> fi
> {code}
> This all also applies to `zookeeper-server-stop.sh`
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