I have an Intel XServe, Late 2006 2 x 2 GHZ Dual-Core Xeon with 20GB DDR2-DIMM RAM running Mac OS X Server Lion 10.7.5 (11G63) that has started to limit AFP connections to 10. This is a problems as we use this server to host Network Home Directories for 1/3 of our students (approximately 100 student directories are hosted on this server via a fiber channel XServe RAID).
I know that OS X Server can handle thousands of simultaneous AFP connections...I'm using two other 10.7.5 XServes to host the other 200 student accounts (1 XServe is an Early 2008 2 x 2.8 Quad Core Xeon with 24 gb of RAM running the same OS Build and the other is an early 2009 2 x 2.26 Quad Core with 24 GB of RAM running the same OS X Server build). Both of those XServes currently have between 40-80 AFP connections. Before last week, the oldes XServe was functioning normally, allowing 20-60 connections. For some reason last week, AFP crashed on this system and when I rebooted the server it now refuses to allow more than 10 AFP connections (confirmed by an error message from clients attempting to connect). I know that this behavior is more indicative of OS X client which only allows 10 simultaneous connections. The only messages in the AFP error logs are:
AppleFileServer[172] <Info>: TCP Listener returned error on accept
repeated over and over again.
Anybody have any thoughts on why this might be happening? After everybody leaves today I'm thinking of disconnecting the RAID from this Server and then attaching it to one of the other two XServes and then re-mapping the the student accounts to the other servers, but I'd hate to decrease my load-balancing as this is already a fairly slow solution as it is.
Thanks,
Christopher
