[DBMail 0001043]: exited on signal 11

A NOTE has been added to this issue. 
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http://www.dbmail.org/mantis/view.php?id=1043 
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Reported By:                jamesgreig
Assigned To:                
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Project:                    DBMail
Issue ID:                   1043
Category:                   POP3 daemon
Reproducibility:            random
Severity:                   crash
Priority:                   normal
Status:                     acknowledged
target:                      
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Date Submitted:             11-Feb-14 11:23 CET
Last Modified:              12-Feb-14 14:12 CET
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Summary:                    exited on signal 11
Description: 
Since rebuilding a number of dbmail machines onto FreeBSD 9.1 and 9.2 with
dbmail 3.1.10 we are seeing random crashes of the pop3d daemon as below:-

Feb 11 09:09:11 redacted-db-4a kernel: pid 1577 (dbmail-pop3d), uid 65534:
exited on signal 11

Each time it fails on signal 11.  
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 (0003637) jamesgreig (reporter) - 11-Feb-14 12:51
 http://www.dbmail.org/mantis/view.php?id=1043#c3637 
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Currently using libzdb from ports in freebsd version:- libzdb-2.11.3 and
libevent2 from ports - libevent-2.0.21-stable 

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 (0003638) jamesgreig (reporter) - 11-Feb-14 17:00
 http://www.dbmail.org/mantis/view.php?id=1043#c3638 
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this should actually be a crash but I failed to mark as a crash when I
submitted it. 

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 (0003639) alan (reporter) - 12-Feb-14 13:23
 http://www.dbmail.org/mantis/view.php?id=1043#c3639 
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Alas with my limited testing I'm unable to reproduce this bug.
Would it be feasible to get a backtrace after building a debug version?
(adding WITH_DEBUG_PORTS=mail/dbmail to /etc/make.conf) 

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 (0003640) jamesgreig (reporter) - 12-Feb-14 13:50
 http://www.dbmail.org/mantis/view.php?id=1043#c3640 
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Hi Alan,

Getting it on 2 machines.  Unfortunately they're live so it's a bit tricky
but will see what I can get.  I've enabled debugging in dbmail itself to
see what I can get.  If it fails again i'll rebuild one of them as above. 

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 (0003641) jamesgreig (reporter) - 12-Feb-14 13:54
 http://www.dbmail.org/mantis/view.php?id=1043#c3641 
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Presume this isn't relevant:-
http://www.gossamer-threads.com/lists/dbmail/users/34008  though admittedly
libzdb in this instance is version 2.11.3 

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 (0003642) paul (administrator) - 12-Feb-14 13:55
 http://www.dbmail.org/mantis/view.php?id=1043#c3642 
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James, the thread you mention only affects imapd.

Getting a debug trace on the crash would help. 

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 (0003643) jamesgreig (reporter) - 12-Feb-14 14:12
 http://www.dbmail.org/mantis/view.php?id=1043#c3643 
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Oddly the last 2 deaths on one machine were the following (different
signals):-

Feb 11 22:13:45 mail4-db-3a kernel: pid 78837 (dbmail-imapd), uid 65534:
exited on signal 6
Feb 12 11:54:32 mail4-db-3a kernel: pid 2346 (dbmail-pop3d), uid 65534:
exited on signal 10


This particular machine was running fine with with 3.0.2 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
11-Feb-14 11:23  jamesgreig     New Issue                                    
11-Feb-14 12:51  jamesgreig     Note Added: 0003637                          
11-Feb-14 17:00  jamesgreig     Note Added: 0003638                          
12-Feb-14 13:23  alan           Note Added: 0003639                          
12-Feb-14 13:50  jamesgreig     Note Added: 0003640                          
12-Feb-14 13:54  jamesgreig     Note Added: 0003641                          
12-Feb-14 13:55  paul           Note Added: 0003642                          
12-Feb-14 13:56  paul           Severity                 minor => crash      
12-Feb-14 13:56  paul           Status                   new => acknowledged 
12-Feb-14 14:12  jamesgreig     Note Added: 0003643                          
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