Strange log file behavior

[Grant]

>> I noticed that most of my rotated nginx log files are empty (0 bytes).
>>
>> My only access_log directive is in nginx.conf:
>>
>> access_log /var/log/nginx/localhost.access_log combined;
>>
>> Also nginx is currently logging to
>> /var/log/nginx/localhost.access_log.1 instead of localhost.access_log.
>>
>> Does anyone know why these things are happening?
>
> This usually happens if someone don't ask nginx to reopen log
> files after a rotation.  See here for details:
>
> http://nginx.org/en/docs/control.html#logs

I use logrotate:

/var/log/nginx/*_log {
        missingok
        sharedscripts
        postrotate
                test -r /run/nginx.pid && kill -USR1 `cat /run/nginx.pid`
        endscript
}

Does it look OK?

- Grant