[Bug 1564451] Re: User processes are counted towards systemd limit for sshd processes

[Seth Arnold]

I'm having trouble reproducing this. I started a few thousand /bin/sleep
commands and was able to log in via ssh as another user; the error
message when logging in again as my normal user account showed an error
message that looked appropriate.

In one ssh:
sarnold at sec-xenial-amd64:~$ for i in `seq 1 6000` ; do /bin/sleep 10 & done
...
[15813] 24043
[15814] 24044
[15815] 24045
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable

In another terminal:
$ ssh -oControlPath=none  root at sec-xenial-amd64
Welcome to Ubuntu Xenial Xerus (development branch) (GNU/Linux 4.4.0-16-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

0 packages can be updated.
0 updates are security updates.

Last login: Thu Mar 31 15:42:23 2016 from 192.168.122.1
root at sec-xenial-amd64:~# 

$ ssh -oControlPath=none  sec-xenial-amd64
shell request failed on channel 0

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https://bugs.launchpad.net/bugs/1564451

Title:
  User processes are counted towards systemd limit for sshd processes

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