I'm running Suse Enterprise 9 SP3 and Zimbra 3.0.1GA (yes I know it's old, they won't let me upgrade until it's stable again).
My message logs show this error
Code:
Mar  1 15:18:35 mailserv6 kernel: open files rlimit 1024 reached for uid 1001 pid 14156
Mar  1 15:18:35 mailserv6 kernel: open files rlimit 1024 reached for uid 1001 pid 14408
Mar  1 15:18:35 mailserv6 kernel: open files rlimit 1024 reached for uid 1001 pid 14408
Then my loads jump from no higher than 15 - 25 (peak) to 85+ immediately
and I can't run more than one command at a console without losing access to that shell. Thus forcing me to press the reset button to get control of the server back.

I've determined that uid 1001 is the zimbra user, once this happens I get repeated auth failures and a few minutes later

Code:
auth failed: curl_easy_perform: error(7): Connect failed
starts showing up in my logs.

Has anyone seen something like this ? I've checked and it looks like the limit should be 10240 files for zimbra instead of 1024. So I'm not sure why this keeps happening, it's happened twice now.

If it helps I'm running zimbra over an IBM ds300 SAN with 4 146 GB u320 drives (firmware on the drives and SAN are current per IBM). I'll be happy to provide any information I can, just ask and I'll get it posted asap.
this seems to be happening every couple of days now.

Thanks