Server.app constantly timing out (devicemgr, wiki, more)

Question

Server.app is constantly stating "Reading Profile Manager settings…" or any other service, though Profile Manager and Wiki are the most common. I get errors in the Console such as:
Jan  8 08:48:42 office.fireflyeducation.com.au servermgrd[2885]: [2885] error in getAndLockContext: flock(servermgr_devicemgr) FATAL time out
Jan  8 08:48:42 office.fireflyeducation.com.au servermgrd[2885]: [2885] process will force-quit to avoid deadlock
Jan  8 08:48:43 office.fireflyeducation.com.au servermgrd[2885]: outstanding requests are: (
                  Command = readSettings;
                  Module = "servermgr_devicemgr";
                  Timestamp = "2013-01-07 22:46:15 +0000";
                  Command = Idle;
                  Module = "servermgr_devicemgr";
                  Timestamp = "2013-01-07 22:46:40 +0000";
                  Command = setWebAppState;
                  Module = "servermgr_web";
                  Timestamp = "2013-01-07 22:46:48 +0000";
                  Command = getWebDAVSharingState;
                  Module = "servermgr_web";
                  Timestamp = "2013-01-07 22:48:25 +0000";
                  Command = getState;
                  Module = "servermgr_devicemgr";
                  Timestamp = "2013-01-07 22:48:26 +0000";
                  Command = getState;
                  Module = "servermgr_wiki";
                  Timestamp = "2013-01-07 22:48:27 +0000";
                  Command = getState;
                  Module = "servermgr_web";
                  Timestamp = "2013-01-07 22:48:27 +0000";
                  Command = getWebAppState;
                  Module = "servermgr_web";
                  Timestamp = "2013-01-07 22:48:27 +0000";
                  Command = getWebDAVSharingState;
                  Module = "servermgr_web";
                  Timestamp = "2013-01-07 22:48:28 +0000";
                  Command = getHistory;
                  Module = "servermgr_info";
                  Timestamp = "2013-01-07 22:48:40 +0000";
Jan  8 08:48:43 office com.apple.launchd[1] (com.apple.servermgrd[2885]): Exited with code: 1
This is a brand new, OS X Server 2.2, OS 10.8.2 installation. I migrated users, mail, calendar and wiki data over manually, but Profile Manager has not even been used (waiting for more RAM first). I even tried the reset procedure given by Apple here (http://support.apple.com/kb/HT5349), but I'm still getting these errors in the Console.
Double-clicking any Group yields the message "Reading File Sharing settings" for nearly over 30 seconds before Server.app completes rendering the group and showing the group's members. The system.log error shown for that is:
Jan  8 08:56:25 office.fireflyeducation.com.au servermgrd[3940]: nsc_smb XPC: handle_event error : < Connection invalid >
Since the error looks SMB related, and we have no need for that, I've ensured that "Share with Windows Clients" is unchecked for all of my three share points.
What gives?

Answer 1

The single biggest mistake in your analysis is assuming that if Windows (or a Wii or an iPhone or whatever other device) can connect, your router is not to blame.
Though devices are designed to standards, there can be errors in implementing those standards or even simple software bugs that come into play.
The example I've used over and over again is say there is a bug where when the router is asked to add "2 + 3" it answers "5" but when asked to add "3 + 2" it answers "6."
If Windows only ever adds "2 + 3" but Mac OS X adds "3 + 2," it's not Apple's fault the router is incorrectly responding "6" in the later case.
But let's start with easier questions:
1) Are you sure that no proxy is being used if one shouldn't be, and vice-versa?
2) Are the DNS addresses shown in your TCP/IP settings the same regardless of whether you are connected via AirPort or Ethernet?
3) Could there be some interference in the area you are using your Mac? Recall also that Mac and Windows PCs use different antenna designs, so what interferes with one may not affect the other.