启动tomcat7.0时报错：unable to start within 45 seconds. If the server requires more time, try increasing t

    该错误产生的背景：

    我的开发环境的配置是：jdk1.8.0_51、Tomcat 7.0、MyEclipse 2015 stable2.0，通过myeclipse启动本地的tomcat时报错：Server Tomcat v7.0 Server at localhost was unable to start within 45 seconds. If
the server requires more time, try increasing the timeout in the server editor.。

    产生原因：不知。

    解决方法：MyEclipse 2015 stable2.0有一个名叫“MyEclipse Derby”的东西，先启动它，然后再启动tomcat即可。