[Dovecot] dovecot-20070605 runtime problems

[David Favor]

David Favor wrote:
> Seems to have had something to do with pam occasionally losing it's 
> marbles.
> I've removed pam from my config file and all works well now with latest 
> dovecot
> with latest openssl development nightly snapshot.
> 
> - David
> 
> Timo Sirainen wrote:
>> On Sun, 2007-06-10 at 21:12 -0500, David Favor wrote:
>>> The 20070605 version of dovecot starts up doing ssl protocol perfect,
>>> then after clicking a few directories, then when clicking back to INBOX,
>>> dovecot hangs. There is no logging info, even with --enable-debug
>>> on and all .conf file directives I can find. Doing a 'ngrep port 993'
>>> shows no SSL dialog.
>>
>> 1) Enable rawlog to see what were the last commands and their output.
>> http://dovecot.org/bugreport.html
>>
>> 2) strace the running imap process to see if it's just waiting in
>> epoll() or if it's doing something else.

There is no imap process to strace. Here's the ps -A | grep dovecot at the time:

dovecot  dovecot  30905 30912  24 09:50   420 00:00:00  0.0  0.1 imap-login      imap-login
dovecot  dovecot  30905 30913  24 09:50   420 00:00:00  0.0  0.1 imap-login      imap-login
dovecot  dovecot  30905 30910  24 09:50   420 00:00:00  0.0  0.1 imap-login      imap-login
dovecot  dovecot  30905 30911  24 09:50   424 00:00:00  0.0  0.1 imap-login      imap-login
root     root     30111   326  23 10:04   240 00:00:00  0.0  0.0 grep            grep dovecot
root     root         1 30905  24 09:50   264 00:00:00  0.0  0.0 dovecot \
         /usr/local/pkgs/dovecot-20070605/sbin/dovecot -c /tools/conf/dovecot.conf
root     root     30905 30906  24 09:50   420 00:00:00  0.0  0.0 dovecot-auth    dovecot-auth
dovecot  dovecot  30905 30909  24 09:50   272 00:00:00  0.0  0.1 imap-login      imap-login


>>> My primary question is howto debug this hang, short of attaching gdb
>>> to the process.
>>
>> If it's not in epoll(), getting a gdb backtrace would be helpful too.
>>
>> Hmm. Or the above things matter only if the problem is with imap process
>> and not with handling the SSL connection. So it would also be good to
>> know if it hangs also without SSL.
>>
>> BTW. --enable-debug doesn't make Dovecot log any more than it normally
>> does. It instead enables some extra code that makes Dovecot do more
>> sanity checks so I can notice sooner if I break something. Unless you're
>> modifying Dovecot's sources yourself it most likely isn't very useful.
>>
> 
> 


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