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alpha/148392: Users of Alpha platform should stay with Dovecot 1.1.16

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Paweł Kaczor

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Jul 5, 2010, 5:01:36 PM7/5/10
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>Number: 148392
>Category: alpha
>Synopsis: Users of Alpha platform should stay with Dovecot 1.1.16
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-alpha
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: update
>Submitter-Id: current-users
>Arrival-Date: Mon Jul 05 21:10:06 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Paweł Kaczor
>Release: 6.3-RELEASE
>Organization:
>Environment:
FreeBSD gustlik.fubar.pl 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Fri Feb 15 13:29:20 CET 2008 ro...@berta.swired2:/usr/obj/usr/src/sys/MYKERNEL alpha
>Description:
Hardware is:
AlphaServer 1200
1GB RAM

Dovecot uses PLAIN authentication.

Upgrading Dovecot server above 1.1.16 version leads to many zombie processes that could eat resources.
After upgrade Dovecot runs dovecot-auth processes which starts zombie:
dovecot 10334 0.0 0.0 0 0 ?? Z 10:51PM 0:00.08 <defunct>

ktrace of dovecot-auth reveals this:
10330 dovecot-auth RET kevent 0
10330 dovecot-auth CALL gettimeofday(0x1200784f0,0x120077620)
10330 dovecot-auth RET gettimeofday 0
10330 dovecot-auth CALL gettimeofday(0x11ffe998,0)
10330 dovecot-auth RET gettimeofday 0
10330 dovecot-auth CALL kevent(0x7,0,0,0x120092000,0xa,0x11ffe9a8)
10330 dovecot-auth RET kevent 0
10330 dovecot-auth CALL gettimeofday(0x1200784f0,0x120077620)
10330 dovecot-auth RET gettimeofday 0
10330 dovecot-auth CALL gettimeofday(0x11ffe998,0)
10330 dovecot-auth RET gettimeofday 0
10330 dovecot-auth CALL kevent(0x7,0,0,0x120092000,0xa,0x11ffe9a8)
and loops forever.

The longer Dovecot runs more zombies are created, rate is one per 30 seconds.
Additionally, each connection to Dovecot leaves one more zombie process.
>How-To-Repeat:
Install Dovecot 1.2.x from ports on Alphaserver 1200 and run it with default dovecot.conf (even taken from examples directory). No mather if you use POP3 or IMAP.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:
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