If you’re performing memory intensive operations such as building workspace on big projects, Eclipse will throw this error when it runs out of memory:

An internal error occurred during: “Building workspace”. GC overhead limit exceeded

In order to fix it, you need to increase the memory allocation for Eclipse. To do this, open eclipse.ini and increase the Xms (heap’s start memory) and Xmx (heap’s maximum memory) values to a value that you think is reasonable with your system and projects, for example:

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-Xms512m
-Xmx1024m