dovecot - Aug 2006 - Seeing dovecot crash under rc6, seems to go almost exactly every 2.5 hours...

We're getting the following crash report, but I'm not sure it contains 
anything immediately useful (especially since we're running on a 
minority platform in OS X)... Anyone see where we might be able to 
resolve this? The crash doesn't kill existing imap processes, but 
dovecot/imap-login needs to be restarted.


**********

Host Name:      mailserver
Date/Time:      2006-08-10 14:24:16.131 -0700
OS Version:     10.4.6 (Build 8I127)
Report Version: 4

Command: dovecot
Path:    /opt/local/sbin/dovecot
Parent:  dovecot [10099]

Version: ??? (???)

PID:    13818
Thread: 0

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000020

Thread 0 Crashed:
0   dovecot     0x0000482c log_set_prefix + 36 (log.c:190)
1   dovecot     0x000070b0 create_mail_process + 1576 (mail-process.c:535)
2   dovecot     0x00005150 auth_master_callback + 96 (login-process.c:92)
3   dovecot     0x00002d9c auth_process_input + 460 (auth-process.c:121)
4   dovecot     0x00017d58 io_loop_handler_run + 388 (ioloop-select.c:140)
5   dovecot     0x0001006c io_loop_run + 48 (ioloop.c:273)
6   dovecot     0x00008c54 main + 1816 (main.c:577)
7   dovecot     0x000020a8 _start + 344 (crt.c:272)
8   dovecot     0x00001f4c start + 60

Thread 0 crashed with PPC Thread State 64:
 srr0: 0x000000000000482c srr1: 
0x100000000200d030                        vrsave: 0x0000000000000000
   cr: 0x84002404          xer: 0x0000000020000000   lr: 
0x0000000000004810  ctr: 0x00000000901313a0
   r0: 0x00000000000070b0   r1: 0x00000000bffff320   r2: 
0x0000000000024810   r3: 0x0000000000000000
   r4: 0x000000000006f380   r5: 0x0000000000000001   r6: 
0x0000000000000000   r7: 0x0000000000000002
   r8: 0x000000006b690073   r9: 0x000000000006f104  r10: 
0x00000000bffff310  r11: 0x0000000000020b3c
  r12: 0x000000000006f399  r13: 0x00000000ffffffff  r14: 
0x0000000000000000  r15: 0x0000000000000000
  r16: 0x000000000006f113  r17: 0x000000000006f228  r18: 
0x0000000000000000  r19: 0x000000000006f0fc
  r20: 0x0000000000000014  r21: 0x000000000001b0c0  r22: 
0x000000000000041a  r23: 0x000000000001b0c0
  r24: 0x00000000018006e8  r25: 0x000000000001bfe0  r26: 
0x000000000006f133  r27: 0x000000000006f2a8
  r28: 0x000000000006f380  r29: 0x0000000000000000  r30: 
0x0000000024002422  r31: 0x0000000000004810

Binary Images Description:
   0x1000 -    0x1ffff dovecot         /opt/local/sbin/dovecot
0x8fe00000 - 0x8fe51fff dyld 44.4       /usr/lib/dyld
0x90000000 - 0x901bbfff libSystem.B.dylib       /usr/lib/libSystem.B.dylib
0x90213000 - 0x90218fff libmathCommon.A.dylib   
/usr/lib/system/libmathCommon.A.dylib
0x936d1000 - 0x936f2fff libmx.A.dylib   /usr/lib/libmx.A.dylib

> We're getting the following crash report, but I'm not sure it
contains
> anything immediately useful (especially since we're running on a 
> minority platform in OS X)... Anyone see where we might be able to 
> resolve this? The crash doesn't kill existing imap processes, but 
> dovecot/imap-login needs to be restarted.
Maybe this is related to my FreeBSD problem...

I have three imap-login processes running but none from around when I 
started dovecot. I have many stale imap processes (see the other thread).

As I don't know correct behaviour: should I normally have imap-login with 
start time of when I started dovecot?

My logs show multiple "dovecot: imap-login: Login" for same user (from
same IP) -- over 130 times in less than one day. Is that normal?

On 11.8.2006, at 2.58, Dean Blackburn wrote:
> We're getting the following crash report, but I'm not sure it  
> contains anything immediately useful (especially since we're  
> running on a minority platform in OS X)... Anyone see where we  
> might be able to resolve this? The crash doesn't kill existing imap  
> processes, but dovecot/imap-login needs to be restarted.
Do you have shutdown_clients=yes in dovecot.conf? If you do, the imap  
processes should die if dovecot process dies.
> Exception:  EXC_BAD_ACCESS (0x0001)
> Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000020
>
> Thread 0 Crashed:
> 0   dovecot     0x0000482c log_set_prefix + 36 (log.c:190)
> 1   dovecot     0x000070b0 create_mail_process + 1576 (mail- 
> process.c:535)
Is there anything in Dovecot's logs before this? Only way I can see  
this happening is if it logs "pipe() failed" before crashing. If it  
did, then maybe you should just increase the file descriptor limit.

I'll anyway fix this crash, assuming it's because of the pipe() problem.


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