When Eclipse or MyEclipse view the server panel, an error is reported, as shown in the figure, the error code: java.lang.NullPointerException. Also, due to this error, the project cannot be started normally.
Solution:
1. First close the MyEclipse workspace.
2. Then delete the file " /.metadata/.plugins/org.eclipse.core.runtime/.settings/com.genuitec.eclipse.ast.deploy.core.prefs " under the workspace.
3. Some information about the deployment project is stored in this file. There is no error after deleting the information of this deployed project.
4. Restart MyEclipse to solve the problem.