When I got to work today, I brought up eclipse in my VM and it came up nicely in the synchronization view (where I had shut it down on Friday). Check for updates, and nothing was found, so … switch to the Java perspective to crank on some code when … yes, you guessed it … Eclipse locks up. I see the redraw of the perspective start, but it only draws part way. Check CPU utilization and … nothing being consumed. Eclipse has just gone into lah-lah land.
I tried all kinds of solutions, like using -clean on the startup, looking at the logs (nothing logged about the lock up). It wasn’t until I stumbled across this post that I found a solution.
Shut down eclipse and then navigate to <eclipse workspace>/.metadata/.plugins/org.eclipse.core.resources and remove the .snap file.