I also had this problem. First try creating a new workspace and see if you have the same problem. If so, try removing the .metadata directory from the damaged workspace.
$ cd ~/<your-eclipse-corrupted-workspace> $ rm -r .metadata/
I made a mistake by closing the "install new software" window after trying to filter "all available downloads" that lasted a long time. This caused a problem. I tried to reinstall. I uninstalled and reinstalled. I deleted the ~/.eclipse . This caused eclipse to start working in the default ~/workspace , ~/workspace , which suddenly had no problem. This made me realize that my problem was a damaged workspace. As soon as I deleted the .metadata folder, the problem disappeared.
There are LaunchPad and eclipse error messages.
Mark mikofski
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