An internal error occurred during : “Publishing to Oracle WebLogic Server v10.3 at localhost…”. requested array is larger than heap

Solution: Goto C:\bea\user_projects\workspaces\default\.metadata\.plugins\org.eclipse.wst.server.core\publish  location

And delete the .bat files starting with publish*.bat e.g: publish0.bat, publish1.bat etc. After deleting try to publish application. This should solve ur problem. Even after doing this if the problem persists then delete the server domain and create new domain.