[Dovecot] Is replication broken?

[Steffen Kaiser]

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On Thu, 30 Jan 2014, IT geek 31 wrote:

> Here are the errors on the remote server (the last two are a different
> mailbox!):
>
> Jan 30 13:25:16 Server2 dovecot: dsync-server(MailUser1): Panic: file
> mbox-lock.c: line 799 (mbox_lock): assertion failed: (lock_type == F_RDLCK
> || mbox->mbox_lock_type != F_RDLCK)
>
> Jan 30 13:25:16 Server2 dovecot: dsync-server(MailUser1): Fatal: master:
> service(doveadm): child 26627 killed with signal 6 (core not dumped - set
> service doveadm { drop_priv_before_exec=yes })

follow the advice, set ulimit -c unlimited, get a core dump, then

gdb /usr/.../binary core
bt full

post the output and use some subject line, e.g.
dsync-server(MailUser1): Panic: file mbox-lock.c: line 799 with coredump
to get Timos attension, that you have information for the panic.

> Any help is appreciated.

provide Timo any information about the core dump, give it an useful title, 
e.g. "BUG Panic: file mbox-lock.c: with backtrace" to catch his attention 
during his busy phases of work. Bumping the subject is not useful.

I found only this: 
http://thr3ads.net/dovecot/2013/05/2645571-dsync-assert-failure-in-2.2.2 
which says "Appears to work properly again in 2.2.4.".

> On 30 January 2014 14:29, Steffen Kaiser <skdovecot at smail.inf.fh-brs.de>wrote:
>
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>> On Thu, 30 Jan 2014, IT geek 31 wrote:
>>
>>  On 30 January 2014 12:52, Steffen Kaiser <skdovecot at smail.inf.fh-brs.de
>>>> wrote:
>>>
>>>  On Thu, 30 Jan 2014, IT geek 31 wrote:
>>>>
>>>>  Apologies for this being my 248th post about replication...
>>>>
>>>>>
>>>>> The current error I'm getting is:
>>>>>
>>>>> Jan 30 12:10:54 Server1 dovecot: dsync-local(MailUser1): Error: dsync(
>>>>> Server2.test.com): read() failed: read((fd)) failed: Connection reset
>>>>> by
>>>>> peer
>>>>>
>>>>>
>>>> this is a generic network error:
>>>> http://stackoverflow.com/questions/1434451/what-does-
>>>> connection-reset-by-peer-mean
>>>>
>>>> The other side of the communication channel closed the connection. It
>>>> also
>>>> does not neccessarily mean that other end point did it, but it could be a
>>>> firewall, router, whatever in between as well.
>>>>
>>>>  Do you know why I am now getting:
>>>
>>>
>>> Jan 30 12:50:43 Server1 dovecot: dsync-local(MailUser1): Error: read(
>>> Server2.test.com) failed: EOF
>>>
>>
>> First you get "Connection reset by peer", the system closes the file
>> descriptot, Dovecot reads further from the handle and gets EOF. It's a
>> subsequent error, IMHO.
>>
>> - -- Steffen Kaiser
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>

- -- 
Steffen Kaiser
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