Whiteboard docker container with a lot of zombie processes

Hello Devs!

Although the app seems to work fine, on the host the docker container runs on, are a lot of zombie processes. They pile up the more one uses the app in nextcloud.

root@misc:~/nextcloud-whiteboard-docker# ps auxww | grep Z
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
nobody      5022  0.0  0.0      0     0 ?        Z    10:03   0:00 [chrome_crashpad] <defunct>
nobody      5024  0.0  0.0      0     0 ?        Z    10:03   0:00 [chrome_crashpad] <defunct>
nobody      5026  0.0  0.0      0     0 ?        Z    10:03   0:00 [chromium] <defunct>
nobody      5027  0.0  0.0      0     0 ?        Z    10:03   0:00 [chromium] <defunct>
root        5593  0.0  0.0   6544  2392 pts/1    S+   10:10   0:00 grep --color=auto Z
root@misc:~/nextcloud-whiteboard-docker# 

Within the docker container I see the same:

Mem: 2316660K used, 5815120K free, 6040K shrd, 62052K buff, 1186688K cached
CPU:   0% usr   0% sys   0% nic  98% idle   0% io   0% irq   0% sirq
Load average: 0.02 0.08 0.03 2/452 465
  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
   18     1 nobody   S    1121m  14%   3   0% {node-MainThread} node websocket_server/main.js
    1     0 nobody   S    1112m  14%   1   0% npm run server:start
  443     0 nobody   S     1708   0%   0   0% /bin/sh
  465   443 nobody   R     1636   0%   3   0% top
   54     1 nobody   Z        0   0%   0   0% [chromium]
   55     1 nobody   Z        0   0%   3   0% [chromium]
   52     1 nobody   Z        0   0%   2   0% [chrome_crashpad]
   50     1 nobody   Z        0   0%   0   0% [chrome_crashpad]

I guess that's not how it is supposed to be, right?

cheers!

Start by reproducing the issue while monitoring processes both on the Docker host and inside the container with the commands shown in the report. Trace the chromium and chrome_crashpad processes and their parents; done means repeated app use no longer leaves zombie processes accumulating in either process listing.