BUG? File descriptor use in cmd_append (for MULTIAPPEND) results in many open files

Ken Murchison murch at andrew.cmu.edu
Tue Dec 12 13:04:10 EST 2006

Nik Conwell wrote:
> I'm using the UW mailutil to transfer mailboxes from UW to Cyrus 
> (2.3.7).  It uses APPEND, specifically multiappend (single APPEND with 
> multiple messages being appended).  Cyrus-imapd handles this multiappend 
> by creating stage files for each appended message and leaving the file 
> descriptor open.  The problem is that after 240 messages, we run out of 
> file descriptors and so an open() of the next stage file fails with 
> EMFILE.  I updated /etc/cyrus.conf to make the max fds be 1024 (AFAICT 
> kernel MAX) which helped somewhat but not for larger mailboxes with > 
> 1008 messages.
> Shouldn't the multiappend/append be closing the FD for each stage file 
> and then reopening it later as it needs it?

Already fixed in CVS:


Kenneth Murchison
Systems Programmer
Project Cyrus Developer/Maintainer
Carnegie Mellon University

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