Dylan Volz commented on TC-374:

This means the processes were orphaned, and adopted by root (as expected) but 
then never waited on (reaped). I happened to have just read about a similar 
issue docker can have here: 
that describes it in detail and perhaps a similar solution can be applied in 
our start up script.

> `systemctl stop traffic_ops` does not kill all processes
> --------------------------------------------------------
>                 Key: TC-374
>                 URL: https://issues.apache.org/jira/browse/TC-374
>             Project: Traffic Control
>          Issue Type: Bug
>          Components: Traffic Ops
>    Affects Versions: 2.1.0
>            Reporter: Dan Kirkwood
>              Labels: systemctl
>             Fix For: 2.1.0
> not sure why it gets in this state,  but traffic_ops processes sometimes get 
> in a state where the parent process is the root (1) for many of the 
> script/cdn workers.   The init.d script doesn't stop them because they don't 
> match the pid in `/var/run/traffic_ops.pid`.
> This needs to be more robust.
> Example:   on my test VM,  if I run this,  I see multiple parent processes:
> {quote}
>  ps -ef | grep script/cdn|grep -v root | awk '\{print $3\}'  | sort -u
>  1
>  22713
>  29306
> {quote}

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