Eclipse Stuck at "Android SDK: Resolving error markers"

My workspace has a lot of project and I could not open it anymore (stuck at resolving error markers). Too much a pain to re-create a new one...
The solution that worked for me with Eclipse 4.2 was to delete all files names .markers in the workspace folder (typically one per project and one for root):

cd [my workspace folder]
cd .metadata
find . -name .markers -exec rm {} \;

eclipse -clean -refresh

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