一、问题发生的原因：C盘磁盘不足，idea启动报IO异常，项目停止运行。我关闭IDEA重新启动，报以下错误：
Problems found loading plugins:
Plugin "Persistence Frameworks Support" was not loaded: required plugin "Database Tools and SQL" is disabled.
Plugin "GlassFish Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "JBoss Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "JSR45 Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "Jetty Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "Resin Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "Tomcat and TomEE Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "CloudBees integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is disabled.
Plugin "Geronimo Integration" was not loaded: required plugin "Java EE: EJB, JPA, Servlets" is dis... (show balloon)
二、IDEA启动报错Plugin Error的解决办法：
找到IDEA的配置文件夹下的disabled_plugins.txt，删除然后重启IDEA即可；
文件存放位置：C:\Users\用户名.IntelliJIdea2017.2\config
我的电脑位置：C:\Users\Administrator.USER-20170315AN.IntelliJIdea2017.2\config
