bugtrack at dbmail
Jun 6, 2012, 8:32 AM
Post #1 of 1
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[DBMail 0000957]: imapd leaks sockets
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A NOTE has been added to this issue.
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http://www.dbmail.org/mantis/view.php?id=957
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Reported By: gcth
Assigned To: paul
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Project: DBMail
Issue ID: 957
Category: IMAP daemon
Reproducibility: always
Severity: major
Priority: normal
Status: confirmed
target:
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Date Submitted: 27-Jan-12 11:07 CET
Last Modified: 06-Jun-12 17:32 CEST
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Summary: imapd leaks sockets
Description:
I'm currently using latest git dbmail with imap only, and I've noticed that
it refuses connections after few hours of working. lsof shows lots of open
sockets:
dbmail-im 24466 dbmail 1352u sock 0,6 0t0
1917799 can't identify protocol
dbmail-im 24466 dbmail 1353u sock 0,6 0t0
1917800 can't identify protocol
dbmail-im 24466 dbmail 1354u sock 0,6 0t0
1917801 can't identify protocol
dbmail-im 24466 dbmail 1355u sock 0,6 0t0
1917802 can't identify protocol
dbmail-im 24466 dbmail 1356u sock 0,6 0t0
1917803 can't identify protocol
dbmail-im 24466 dbmail 1357u sock 0,6 0t0
1917804 can't identify protocol
dbmail-im 24466 dbmail 1358u sock 0,6 0t0
1917805 can't identify protocol
they are increasing in time leading to saturation of nofiles ulimit. This
problem applies to imapd, I could not reproduce this problem with pop3.
Typical clients connects with latest thundderbird, mostly from local LAN.
Increasing ulimit -n to 8192 allows enough leaks to last for whole day, so
now as a workaround I restart dbmail every night. I'm attaching munin graph
for:
lsof -ln -u dbmail | grep ^dbmail-im | fgrep sock\ -c
during normal work hours.
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(0003392) paul (administrator) - 27-Jan-12 16:35
http://www.dbmail.org/mantis/view.php?id=957#c3392
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I can confirm this. Looks like there is a thread-race in the imap code.
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(0003429) gcth (reporter) - 03-Apr-12 17:07
http://www.dbmail.org/mantis/view.php?id=957#c3429
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In current master this bug is still present.
Any chances for a fix? What else do you need to debug this?
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(0003449) vampyre (reporter) - 15-May-12 19:46
http://www.dbmail.org/mantis/view.php?id=957#c3449
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Hello Paul,
Could you please share your assumptions if you have some, as this is quite
major issue and it is important to get it fixed as fast as possible.
Thank you.
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(0003456) JensKapitza (reporter) - 06-Jun-12 17:32
http://www.dbmail.org/mantis/view.php?id=957#c3456
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Can be produced with going offline in thunderbird
seems to be a problem in gooing offine
(closing thunderbird) works
Issue History
Date Modified Username Field Change
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27-Jan-12 11:07 gcth New Issue
27-Jan-12 11:07 gcth File Added: sockets.png
27-Jan-12 16:35 paul Note Added: 0003392
27-Jan-12 16:35 paul Assigned To => paul
27-Jan-12 16:35 paul Status new => confirmed
03-Apr-12 17:07 gcth Note Added: 0003429
15-May-12 19:46 vampyre Note Added: 0003449
06-Jun-12 17:32 JensKapitza Note Added: 0003456
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