[jira] [Assigned] (KAFKA-10272) kafka-server-stop.sh fails on IBM i

["Mickael Maison (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-10272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mickael Maison reassigned KAFKA-10272:
--------------------------------------

    Assignee: Jesse Gorzinski

> 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
>   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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