Every new day my projects are lost in project browser in eclipse-indigo but remain in disk, so I must import all projects again in every morning. Do you have any idea about this problem?
I can see all projects in ~/workspace/.metadata/.plugins/org.eclipse.core.resources/.projects
When I open the eclipse, the files which I worked one day ago, make an exception: org.eclipse.core.runtime.CoreException: The file does not exist.
Two days ago my eclipse crashed and this problem started probably after this time. Also I found these in error logs:
--> The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.
--> Ignored attempt to add saveable that was already registered
--> Unable to create editor ID org.eclipse.jdt.ui.PropertiesFileEditor: The file does not exist.
Solution:
Shut down Eclipse IDE
Remove and backup your workspace/.metadata/.plugins/org.eclipse.core.resources directory
Start Eclipse IDE (with -clean to be super-safe)
Reimport all projects (UPDATE: Just use File->Import->Existing Project into Workspace and browse your workspace/project directory)
Enjoy
Source: http://ahtik.com/blog/2008/01/15/eclipse-workspace-fails-to-start-after-crash-quick-fix/