dovecot - Aug 2010 - Problem creating sockets after Solaris Live Upgrade

Hello, 

I use Solaris Live Upgrade to install solaris patches in an alternate boot
environment. Unfortunately the dovecot sockets
/opt/local/var/run/dovecot/dict-server and
/opt/local/var/run/dovecot/login/default are created as normal files in the ABE.
After switching to the ABE dovecot will not start because of the existence of
these two files. After removing these files dovecot starts normally. I think
that dovecot should create the sockets even if there exist files with the same
names. Here is the protocol of this:

Dovecot uses two sockets in the running system:

# ls -al /opt/local/var/run/dovecot/login/default
/opt/local/var/run/dovecot/dict-server
srwxrwxrwx   1 root     root           0 Aug  4 10:07
/opt/local/var/run/dovecot/dict-server
srw-rw----   1 root     dovecot        0 Aug  4 10:07
/opt/local/var/run/dovecot/login/default

In the Alternate Boot Environment created with Solaris Live Upgrade there are
normal files instead of the sockets:

# ls -al /a/opt/local/var/run/dovecot/login/default
/a/opt/local/var/run/dovecot/login/default
-rw-rw----   1 root     dovecot        0 Jul  7 17:01
/a/opt/local/var/run/dovecot/login/default
-rw-rw----   1 root     dovecot        0 Jul  7 17:01
/a/opt/local/var/run/dovecot/login/default

During booting this ABE dovecot will not start, unless both files are removed:

Aug  6 06:55:30 hostname dovecot: Fatal: Socket already exists:
/opt/local/var/run/dovecot/dict-server

# ls -al /opt/local/var/run/dovecot/dict-server
-rwxrwxrwx   1 root     root           0 Aug  4 10:09
/opt/local/var/run/dovecot/dict-server

# rm /opt/local/var/run/dovecot/dict-server

# /etc/init.d/dovecot start
Last died with error (see error log for more information): Socket already
exists: /opt/local/var/run/dovecot/dict-server
Aug  6 06:57:50 hostname dovecot: [ID 583609 local0.info] Dovecot v1.2.12
starting up
Aug  6 06:57:50 hostname dovecot: [ID 583609 local0.error]
net_listen_unix(/opt/local/var/run/dovecot/login/default) failed: Address
already in use
Aug  6 06:57:50 hostname dovecot: [ID 583609 local0.crit] Fatal: Couldn't
create auth process listener

# ls -al /opt/local/var/run/dovecot/dict-server
srwxrwxrwx   1 root     other          0 Aug  6 06:57
/opt/local/var/run/dovecot/dict-server

# ls -al /opt/local/var/run/dovecot/login/default
-rw-rw----   1 root     dovecot        0 Aug  4 10:09
/opt/local/var/run/dovecot/login/default

# rm /opt/local/var/run/dovecot/login/default

# /etc/init.d/dovecot start

# ls -al /opt/local/var/run/dovecot/login/default
srw-rw----   1 root     dovecot        0 Aug  6 07:00
/opt/local/var/run/dovecot/login/default

Both sockets are created by dovecot if they don't exist.

Greetings,
J?rgen Obermann
--
Hochschulrechenzentrum der | Mail: Juergen.Obermann at hrz.uni-giessen.de
Justus-Liebig-Universitaet | WWW:  http://www.uni-giessen.de/obermann/
Heinrich-Buff-Ring 44      | Tel:  0641-99-13054 (0641-99-13001)
D-35392 Giessen, Germany   | Fax:  0641-99-13009

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On Fri, 2010-08-06 at 11:52 +0200, J?rgen Obermann wrote:
> During booting this ABE dovecot will not start, unless both files are
removed:
> 
> Aug  6 06:55:30 hostname dovecot: Fatal: Socket already exists:
/opt/local/var/run/dovecot/dict-server
Doesn't it say something about "Socket operation on non-socket"?
Anyway.. I thought about this, and I don't think I want to change how it
works. Dovecot shouldn't go deleting files that exist, just in case
someone accidentally configured some socket to point to wrong location.

Just create a wrapper script that deletes the
entire /opt/local/var/run/dovecot/ directory at startup.