Eclipse internal error while initializing Java tooling

1. Close Eclipse.
2. Go to workspace folder in windows explorer and delete following folders:
   • .metadata
   • .recommenders
   • RemoteSystemsTempFiles
   • Servers
3. Open Eclipse and provide the same workspace folder again during launch.

Delete your existing workspace and then recreate the workspace and add your projects.

Just change the following values at "eclipse.ini" file to the following:

-Xms1024m
-Xmx2048m

Note:

• You can find the "eclipse.ini" file by right click eclipse icon on and select "Open file location".
• This error occurs because the eclipse is running out of memory, so we just increased the assigned memory for the eclipse application.

I would just like to add, that simply closing and reopening eclipse has always worked for me with this type of error.