2.2.25 dumps core with "Panic: file imap-client.c: line 837 (client_check_command_hangs): assertion failed: (client->io != NULL)"

[Piper Andreas]

Am 01.09.2016 um 14:17 schrieb Aki Tuomi:
> 
> 
> On 01.09.2016 14:20, Piper Andreas wrote:
>> Hello Timo,
>>
>> with the newly build CSW-package the crashes still occur, today already
>> twice within two hours. The log shows always the same:
>>
>> Sep  1 11:50:13 surz113 dovecot: [ID 583609 mail.crit] imap(user):
>> Panic: file imap-client.c: line 837 (client_check_command_hangs):
>> assertion failed: (client->io != NULL)
>> Sep  1 11:50:13 surz113 dovecot: [ID 583609 mail.error] imap(user):
>> Error: Raw backtrace: 0xffff80ffb633d88d -> 0xffff80ffb636ae82 ->
>> 0x41eba0 -> 0x41ecf3 -> 0xffff80ffb635d248 -> 0xffff80ffb6350d2f ->
>> 0xffff80ffb63519e0 -> 0xffff80ffb6350dce -> 0xffff80ffb6350f90 ->
>> 0xffff80ffb62e3ebb -> 0x42f169 -> 0x41292c
>> Sep  1 11:50:13 surz113 dovecot: [ID 583609 mail.crit] imap(user):
>> Fatal: master: service(imap): child 11227 killed with signal 6 (core not
>> dumped - set service imap { drop_priv_before_exec=yes })
>>
>> This happens with different users, the last one with a relatively small
>> mailbox of 600MB.
>>
>> doveconf -n is attached.
>>
>> Dovecot 2.2.25
>> OS: Solaris 11 (SunOS 5.11 11.3 i86pc i386 i86pc)
>> Virtualization: VMware
>> Filesystem: ZFS
>> active users: ~4000
>>
>> The system was transferred at beginning of last week from an old
>> SPARC-station with Solaris 10 running dovecot-2.2.15 to this virtualized
>> platform under VMware. The mailboxes (maildir-format) were transferred
>> without change by switching the storage-hardware to the new server. I
>> had to remove all dovecot.index*-files for errors of "CPU Architecture
>> changed", but after doing this all seemed to work ok except for these
>> occasional crashes.
>>
>> If you need more information, please let me know.
>>
>> Thanks for any help,
>> Andreas
>>
>>> Hi Jake,
>>>
>>> thanks for fixing this. I have installed now the newly built package on
>>> my production system and will report, if any more core dumps occur.
>>>
>>> Regards,
>>> Andreas
>>>
> 
> Hi!
> 
> Is it possible for you test out a small patch (attached) to see if it
> fixes this issue?
> 
> Aki
> 

Hello and thanks for this patch,

I will try to have it implemented by the OpenCSW-maintainers for a test
version as I do not have a compilation environment ready at hand.

I'll report the results asap.

Thanks again,
Andreas



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