[Dovecot] failed: Too many open files

Masaharu Kawada mkawada at redhat.com
Mon Mar 29 07:42:51 EEST 2010

Hi Timo-san, Tony-san,

Thank you very much for your comments. In the output of a 'lsof', I see 
a lot of the following messages.

 >dovecot-a  7346              root   10u     sock        
0,5               181268 can't identify protocol
 >dovecot-a  7346              root   11u     sock        
0,5               277537 can't identify protocol

I found a quite similar issue posted at:

I would like to make sure if there is no way to avoid this issue
without updating the dovecot package.


Timo Sirainen wrote:
> On Fri, 2010-03-26 at 11:15 -0400, Tony Rutherford wrote:
>> Run "lsof" or something similar to see what open filedescriptors there 
>> are.  I ran into this same issue...and it had nothing to do with 
>> Dovecot...Dovecot was just unlucky enough to be requesting to open a 
>> file when the limit was already reached.
> The error message for that situation is actually different:
> Too many open files in system
> vs.
> Too many open files

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