Display error message when open the eclipse: An error has occurred. See the log file null. How about this solution?

Try to launch it from the console like:

C:\path\to\eclipse\eclipse -clean

Also you try to can delete the file to fix the problem permanently as suggested here. Command would be something like below for windows.

del  YOUR_WORKSPACE/.metadata/.plugins/org.eclipse.core.resources/.snap

I ran into the same problem. When I try running eclipse as Administrator, the problem went away.

Had same issue. To resolve it : Go to Eclipse directory -> Open CMD -> eclipse -clean

worked well.