Eclipse error could not write metadata for "XXX"

Could not write metadata for '/test '.

This problem occurs because when you delete an item, you do not delete the item on the hard disk at the same time, and then you delete the item from the hard disk file system.

Find \.metadata\.plugins\org.eclipse.core.resources\.projects in the Eclipse workspace workspace

Create a new test below it and open eclipse, and in the list of items, the newly created test project will appear, delete it directly, and choose to delete it on the hard drive.