10.7.5 Lion Server limiting AFP connections to 10

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

I've done some more digging and it looks like the three packages included in the update have about 4000 files that didn't get installed.  A good number of them are .png or .icns files, but there are whole applications (e.g. VNCServer) that didn't get updated.
The system is currently in a state where it cannot install software via Software Update or via Installer.
Any ideas?

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      r8: 0x0000000000800000   r9: 0x00000000100614f7  r10: 0x0000000000000000  r11: 0x0000000100614f70
    r12: 0x00007fff70380490  r13: 0x0000000000000000  r14: 0x00000001006141c0  r15: 0x00000001138d5ab8
    rip: 0x00007fff8602a160  rfl: 0x0000000000010286  cr2: 0x0000000000000000
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       0x7fff87ac1000 -     0x7fff881be06f  com.apple.CoreGraphics 1.545.0 (???) <356D59D6-1DD1-8BFF-F9B3-1CE51D2F1EC7> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/CoreGraphics
       0x7fff881bf000 -     0x7fff88200fef  com.apple.QD 3.36 (???) <5DC41E81-32C9-65B2-5528-B33E934D5BB4> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ QD.framework/Versions/A/QD
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    while(true){
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       new ClientHandler(socket).start(); /ClientHandler is the class that should be handling the communication with the client
    }

  • AFP automount sharing broken in Lion Server?

    Network rundown:
    Mac Mini running Server
    two MBPs (one upgraded to Lion, the other still running Snow Leopard)
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    /Volumes/Attic -> afp://;AUTH=No%20User%20Authent@myserver/Attic
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    When the Mini is running Snow Leopard Server (10.6.8), the automounting behavior works as expected when connecting from a laptop without a valid Kerberos ticket:
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    klist: krb5_cc_get_principal: No credentials cache file found
    lionmbp:~>ls /Groups
    ls: Groups: Invalid argument
    lionmbp:~>ls /Volumes/Attic
    [snip - file listing]
    lionmbp:~>df -h /Volumes/Attic
    Filesystem                                Size   Used  Avail Capacity  Mounted on
    afp_000000004oMw0oYHtK4AvcMP-1.2d00010a  466Gi  277Gi  189Gi    60%    /Volumes/Attic
    lionmbp:~>ls /Volumes/Multimedia
    ls: Multimedia: Invalid argument
    and then with a valid Kerberos ticket:
    lionmbp:~>sudo umount /Volumes/Attic
    Password:
    lionmbp:~>df -h /Volumes/Attic
    Filesystem    Size   Used  Avail Capacity  Mounted on
    map -static    0Bi    0Bi    0Bi   100%    /Volumes/Attic
    lionmbp:~>klist -f
    [snip]
    Sep 19 23:27:17  Sep 21 23:27:17  FPRIA  krbtgt/DOMAIN@DOMAIN
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    [snip - file listing]
    lionmbp:~>ls /Volumes/Attic
    [snip - file listing]
    lionmbp:~>ls /Volumes/Multimedia/
    [snip - file listing]
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    lionmbp:~>klist -f
    klist: krb5_cc_get_principal: No credentials cache file found
    lionmbp:~>ls /Groups
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    lionmbp:~>ls /Volumes/Attic
    ls: Attic: Input/output error
    lionmbp:~>ls /Volumes/Multimedia/
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    lionmbp: /usr/bin/kinit
    [snip - provide password]
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    [snip]
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    lionmbp:~>date
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    lionmbp:~>ls /Volumes/Attic
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    lionmbp:~>ls /Volumes/Multimedia/
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    Notes:
    I only tried the automounting from the Lion MBP, I would expect that a Lion <-> Lion AFP connection would have fewer issues than Snow Leopard <-> Lion
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    In performing the Lion Server upgrade, I follow all the defaults. The server is booted off the USB drive to ensure it is in a working state before starting the upgrade. The only post-upgrade changes are to run Software Update (mainly to capture the recent security update) and then to follow the single signon instructions posted here

    Some more testing hints in the direction of the problem:
    aragorn:~>kinit -l 48h -r 48h -p -f [email protected]
    [email protected]'s Password:
    aragorn:~>klist -fCredentials cache: API:1501:10
            Principal: [email protected]
      Issued           Expires        Flags    Principal
    Oct  1 17:05:53  Oct  3 17:05:50  FPRIA  krbtgt/[email protected]
    aragorn:~>ls /Volumes/Multimedia
    ls: Multimedia: Invalid argument
    aragorn:~>mkdir /tmp/test; chmod 777 /tmp/test
    aragorn:~>sudo mount_afp "afp://;AUTH=Client Krb [email protected]/Multimedia" /tmp/test
    mount_afp: AFPMountURL returned error -50, errno is -50
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    paramErr                      = -50,  /*error in user parameter list*/
    That both ways of mounting AFP seem to be complaining of argument/parameter errors indicates something isn't being passed across the network correctly or is not being parsed properly on one end or the other. At the moment my dtrace-fu isn't strong enough to delve into this more deeply.
    With 10.7.2 due out soon, I think I'll wait to see if Apple engineering caught this already. If not, I'll raise a bug ticket.

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