[Tickets #10776] Re: cpu usage is high (~ 100%)

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Ticket URL: http://bugs.horde.org/ticket/10776
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  Ticket             | 10776
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | cpu usage is high (~ 100%)
  Queue              | IMP
  Version            | 5.0.14
  Type               | Bug
  State              | Feedback
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             | Michael Slusarz
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Michael Slusarz <slusarz at horde.org> (2011-12-08 13:44) wrote:

>> Your IMAP server is broken.
>
> dovecot-imapd                    1:1.2.9-1ubuntu6.5

That version is 2+ years old.  Timo has fixed a bunch of bugs in 1.2.x  
since then:

http://dovecot.org/doc/NEWS-1.2

>> You need to provide IMAP debug logs, so we can see if we are able to
>> workaround the broken server.
>
> Horde/IMP imap debug log is impossible on a production server  
> (logfile size) but I found something interesting in the syslog at  
> this time:
> Dec  8 14:23:13 mailserver dovecot: imap-login: Disconnected (no  
> auth attempts): rip=127.0.0.1, lip=127.0.0.1, TLS handshaking:  
> SSL_accept() failed: error:1408F10B:SSL  
> routines:SSL3_GET_RECORD:wrong version number

Irrelevant.

Without a debug log, we can't do anything unfortunately.  Your other  
option is to isolate a message causing the issue, move it to a  
temporary account, and then do imap debug logging on just that account.