Dovecot 2.2.24 coredump client_check_command_hangs()

[Timo Sirainen]

On 08 Jun 2016, at 12:23, Peter Eriksson <peter at ifm.liu.se> wrote:
> 
> I’m seeing core dumps from Dovecot’s imap process (around 1/day currently) from client_check_command_hangs().
> 
> Dovecot 2.2.24
> OS: Solaris 10
> CPU: x86
> Filesystem: Local ZFS
> 
> Most crashes are associated with one user (with 25GB of mail in his mailboxes) but some (two) are also associated with other user with “just” 10GB mail.
> 
> Please find enclosed various log files/traces. Let me know if there is something else I might be able to provide that might give more insight into this.

Could you also print in dbx:

print *client->command_queue
print *client->command_queue->next
print *client->command_queue->next->next
print *client->command_queue->next->next->next
..etc until it stops working

Looks like there is still some bug with command pipelining.