I have a red exclamation mark over my project name in Eclipse, looking like this – 
.
Does anyone know what this means and what I should I do about it?
Eclipse – the reason for a red exclamation mark next to the project in Eclipse
eclipse
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Best Answer
There is a Problems view (try Window->Show View) which shows this kind of thing.
It's usually missing Jars (eg your project configuration references a jar that isn't there), and that kind of thing, in the case of JDT, but obviously these days Eclipse can be used in so many ways, it could be anything.