[Dovecot] Dovecot 1.2.11 core dump analyse

[Pierre]

http://el-presidente.edelhost.de/hg/dovecot-1.2/rev/578dcf893777
<<
file istream: If trying to seek backwards in unseekable stream, panic.
The previous way of just setting an error flag was getting ignored too
easily and causing silent corruption in such situations.
>>
hum... 
I don't really understand what happens :/


On 30/avr - 14:44, Pierre wrote:
> 
> Hi list
> 
> I recently experienced core dumps on one of my dovecot
> servers:
> 
> Apr 30 13:46:49 <ip> dovecot: [ID 583609 mail.error] dovecot: child 4088 (imap) killed with signal 6 (core dumped) 
> Apr 30 13:46:56 <ip> dovecot: [ID 583609 mail.error] IMAP(xx at xx.be): Raw backtrace: 0x80e42f9 -> 0x80e3df3 -> 0x80e9fbe -> 0x80e86d2 -> 0x80da020 -> 0x80e86d2 -> 0x806ff0c -> 0x806e80b -> 0x80671fa -> 0x806b4e1 -> 0x806c1b6 -> 0x806c171 -> 0x806c333 -> 0x806cc8a -> 0x80eb761 -> 0x80eb161 -> 0x8074261 -> 0x80652ec 
> Apr 30 13:46:58 <ip> dovecot: [ID 583609 mail.error] IMAP(xx at xx.be): Raw backtrace: 0x80e42f9 -> 0x80e3df3 -> 0x80e9fbe -> 0x80e86d2 -> 0x80da020 -> 0x80e86d2 -> 0x806ff0c -> 0x806e80b -> 0x80671fa -> 0x806b4e1 -> 0x806c1b6 -> 0x806c171 -> 0x806c333 -> 0x806cc8a -> 0x80eb761 -> 0x80eb161 -> 0x8074261 -> 0x80652ec 
> Apr 30 13:47:00 <ip> dovecot: [ID 583609 mail.error] dovecot: child 4279 (imap) killed with signal 6 (core dumped) 
> Apr 30 13:47:00 <ip> dovecot: [ID 583609 mail.error] dovecot: child 4279 (imap) killed with signal 6 (core dumped) 
> 
> I went to xx at xxx.be 's maildir, and saw a big file named core:
> -rw-------+  1 vpopmail vchkpw 3.9M 2010-04-30 13:47 core
> 
> I'm on solaris 10 server, how to analyse this core dump to find what caused it ?
> 
> 
> Thanks in advance,
> Pierre