Too many open files

Dale Ghent daleg at
Sat Aug 25 11:57:54 EDT 2007

On Aug 24, 2007, at 11:49 AM, Rob McMahon wrote:

> Cyrus-2.2.13 (yes, I know it's getting on a bit).  Solaris 10 SPARC,
> around 115,000 mailboxes.
> After deleting just a few, I start getting errors like "Must login
> first", "System I/O Error" (sorry, I haven't got the exact messages to
> cut & paste).  Looking in the logs I see:

We (Rob Banz and I) are seeing the same thing on Solaris 10 x86. We  
started our mass mail migration this past monday and a number of user  
migrations have failed due to the same error.

We haven't found the cause yet, but to get around it for now we  
cranked up the per-process FD limit and limited the number of  
requests a imapd is allowed to handle. It looks like a file  
descriptor leak of some sort. So far that has been a decent work-around.


Dale Ghent
Specialist, Storage and UNIX Systems
UMBC - Office of Information Technology
ECS 201 - x51705

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