Jail fails to unmount a directory

[list+org.freebsd.jail at io7m.com]

On 2016-10-31T14:07:16 -0400
Ernie Luzar <luzar722 at gmail.com> wrote:
> 
> The correct way to stop the jail is to issue this command from the host 
> command line
> 
> host# jail -v -f com.example.service0.conf -r com_example_service0

Hello.

The problem with this is that jails can end up in this broken, undead
state. It seems rather nasty that the created process could crash,
leaving a nonexistent jail with no processes that nevertheless can't be
restarted without first "destroying" it, even though it appears to have
already gone! How is an administrator even supposed to know that a jail
that doesn't appear in the output of `jls` must be destroyed before it
can be started?

M

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