Date:  Sun, 15 Mar 2009 11:50:27 +1100
From:  Xin CHEN <xchen (at mark) housleyconsulting.com.au>
Subject:  [coba-e:15314] Dovecot Auth I/O Leak Error
To:  coba-e (at mark) bluequartz.org
Message-Id:  <561A3E35-7E87-40D7-A1C7-FC4525EDA0A5 (at mark) housleyconsulting.com.au>
X-Mail-Count: 15314

Hi All,

We have couple of BQ Servers running (Centos 4.5). We didn't do yum  
update to any of the Server yet.

One of our Server has some problems with Dovecot these days.

In the maillog file, there are a lot of messages:
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (928)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (919)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (569)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (153)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (533)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (361)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (271)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (219)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (424)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (413)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (374)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (947)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (930)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (923)
Mar 15 11:01:09 s8 dovecot: auth(default): I/O leak: 0x805e160 (249)

We can get more than 1000 process running when checking process: ps - 
ef |grep dovecot-auth
root     26456     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26457     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26458     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26459     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26460     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26461     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26462     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26463     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26464     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26711     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26712     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26713     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26720     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26721     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26722     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26831     1  0 Mar08 ?        00:00:00 dovecot-auth
root     26833     1  0 Mar08 ?        00:00:00 dovecot-auth

Is this a bug in dovecot ?

I will try to kill them all and restart dovecot for now. Any  
suggestions are appreciated!

-tim