empty variable in access log

[Maxim Dounin]

Hello!

On Sun, Nov 29, 2020 at 05:35:19AM -0800, Frank Liu wrote:

> If I create a variable, default to blank:
> 
>    map upstream_env $upstream_env {
>        default "";
>    }
> 
> and log it in access log (log_format has $upstream_env). I see a "-" in the
> log file, which is as expected, but for a 2-way SSL virtual host, I don't
> see the "-", just blank. Is that a bug?

The above snippet is expected to always result in "", as the above 
variable has the value "".  If it results in "-" being logged for 
you, this is certainly not something expected, please share full 
configuration which demonstrates the problem.

-- 
Maxim Dounin
http://mdounin.ru/