org.dom4j.DocumentException: Connection timed out: connect Nested exception:

        最近启动tomcat的时候特别久,看日志mapping 实体类的时候会卡住,有时启动tomcat会出现org.dom4j.DocumentException: Connection timed out: connect Nested exception ,最后一个个实体文件对比,发现是某个文件引用到了错误的头文件：

<!DOCTYPE hibernate-mapping PUBLIC 
                  "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
                 " 

                  "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 

                 " http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd ">

     将其改为：<!DOCTYPE hibernate-mapping PUBLIC 
                                              "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
                                              " http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd ">

    重启tomcat即可.