[DBMail 0001062]: TimsieveD dies/get's zombie after 2/3 days running

A NOTE has been added to this issue. 
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http://dbmail.org/mantis/view.php?id=1062 
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Reported By:                jasb
Assigned To:                
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Project:                    DBMail
Issue ID:                   1062
Category:                   Sieve (delivery, dbmail-sievecmd, dbmail-timsieved)
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     new
target:                      
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Date Submitted:             06-Nov-14 22:16 CET
Last Modified:              10-Nov-14 17:52 CET
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Summary:                    TimsieveD dies/get's zombie after 2/3 days running
Description: 
Hi,

TimsieveD, is the daemon that less work has, and after 2 or 3 days it gets
zombie, with about 700MB of ram usage, LMTPD that has much more work than
it, after 3 days is only consuming ~70MB of ram.
When it gets zombie, I can see using strace that is with the open files
problem.
I believe that for SIEVED 4096 open files should be enough.
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 (0003684) jasb (reporter) - 10-Nov-14 17:52
 http://dbmail.org/mantis/view.php?id=1062#c3684 
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Hi,

Added the stack trace when it dies with too many files open.
It was also filling up my system logs with this info, 

Issue History 
Date Modified    Username       Field                    Change               
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06-Nov-14 22:16  jasb           New Issue                                    
10-Nov-14 17:51  jasb           File Added: timsieved stack trace.txt           
        
10-Nov-14 17:52  jasb           Note Added: 0003684                          
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