The error occurs when an application using Python symbol mappings in Mac OS X is not able to connect to a (previously) networked drive, Time Machine, Bonjour, shared or remote drives, etc. (nwnode). It's a depreciated method, which mostly is why Lion displays the error. Even if you don't use Time Machine, this error can occur, either from an os upgrade or app that uses Python (Dropbox in this case).
Usually the issues can be resolved by following these steps (via Apple):
Resolution
- In the Finder, double-click on your hard disk.
- Open the folder named System.
- Open the Library folder.
- Open the Filesystems folder.
- Drag the folder named "URLMount (from old Mac)" to your desktop as a precautionary backup.
- Once the copy is complete, control-click the original "URLMount (from old Mac)" folder (not the one on your desktop) and choose "Move
to Trash" from the contextual menu.
- Enter the name and password of an administrator if prompted. The first user account created on your Mac is an administrator account.
- Restart.
http://support.apple.com/kb/TS1736
*note: The question above was posted six months ago, although I decided to answer it today simply because nobody seemed to know the answer. Hopefully someone who reads this will understand what the error means now.
And just for Bryson, here is just one of it's strings in symbol_mappings.py:
'__ZN17SharePointBrowser18setConnectionStateE21NWNodeConnectionState' :
'SharePointBrowser.o',
swapfile0, swapfile1 and so on are swap files. You can sort of think of them like "backup" RAM. When your computer doesn't have enough RAM to accomodate the memory requests of all your programs (which is almost always, this is normal), it uses these files to "write out" part of what it had in RAM.
The sleepimage has a very similar use, except it's used only when your Mac hibernates/wakes up.
Deleting any of the swapfile* files is likely to mess up your system, but you can safely delete sleepimage. However, it's kind of pointless, it will probably be recreated the next time you put your computer to hibernation. If you really want to delete it, you'd have to use sudo rm, since root owns the file.
Finally, it's normal for the sleepimage to take up to 4 GB; it will usually take the same space as your RAM.
EDIT You can delete /var/vm/sleepimage safely, but it will be recreated when you put the Mac to sleep. If you run sudo pmset -a hibernatemode 0; sudo rm /var/vm/sleepimage, the Mac will use a normal sleep mode (like desktop Macs by default) and it won't recreate /var/vm/sleepimage. See this post with more information.
Best Answer
In a nutshell, sharedfileslistd is an XPC helper agent that provides SharedFilesLists private API in CoreServices that gets called by, for instance, by LaunchServices APIs and works with so-called SharedFilesLists - special property lists that contain NSURL BookmarkData entries. These are used for recent documents/servers/hosts that you see in Apple->Recent Items menu, Favourites/iCloud items/Bonjour hosts that appear in the Finder sidebar, Recent Documents in applications' Save/Open dialogs) and such.
sharingd is sharing daemon that enables AirDrop, Handoff, Instant Hotspot, Shared Computers, and Remote Disc in the Finder.