Nginx won't reopen log files.

[Michael Lustfield]

Recently I noticed that logrotate does not actually rotate the files correctly.
I noticed this in 0.8.54.

The issue seems to be that neither -USR1 or -s reopen will reopen the log files
after they've been rotated. I'm not sure if this specific to the version
packaged in Debian but I've seen it as an issue on both Ubuntu and Debian.

Below is what I tried to do to figure out what's going on...

### Clean slate
root at liber:/var/log/nginx# /etc/init.d/nginx stop
Stopping nginx: nginx.
root at liber:/var/log/nginx# rm *

### Start Nginx: Creates new log files
root at liber:/var/log/nginx# /etc/init.d/nginx start
Starting nginx: nginx.
root at liber:/var/log/nginx# du access.log access.log.1
8       access.log
du: cannot access `access.log.1': No such file or directory

### Force logrotate to run (which runs the kill -USR1)
root at liber:/var/log/nginx# logrotate -f /etc/logrotate.d/nginx 

### Log files rotated
root at liber:/var/log/nginx# du access.log access.log.1
0       access.log
8       access.log.1

### At this point files should already be getting written to the new file
### because of the -USR1 in the logrotate script
root at liber:/var/log/nginx# du access.log access.log.1
0       access.log
24      access.log.1

### To make sure the kill was run, we invoke it ourselves
root at liber:/var/log/nginx# kill -USR1 `cat /var/run/nginx.pid`

### And see that nginx still isn't using the new file
root at liber:/var/log/nginx# du access.log access.log.1
0       access.log
48      access.log.1

### Using the more proper approach
root at liber:/var/log/nginx# nginx -s reopen

### We get the same thing
root at liber:/var/log/nginx# du access.log access.log.1
0       access.log
68      access.log.1

### Trying a less appropriate option....
root at liber:/var/log/nginx# /etc/init.d/nginx reload
Reloading nginx configuration: nginx.

### It's finally reopened the files
root at liber:/var/log/nginx# du access.log access.log.1
20      access.log
68      access.log.1


Hopefully some smart people here can tell me what I'm doing wrong. :)