tomcat8 启动报错: ignoring option PermSize=256m处理方法

tomcat版本由7.0升级到8.0启动时，日志报错 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=512m; support was removed in 8.0 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=1024m; support was removed in 8.0 查找资料发现 -XX:PermSize和-XX:MaxPermSize在jdk1.8中被弃用了，使用-XX:MetaspaceSize和-XX:MaxMetaspaceSize替代。 所以此时VM参数正确应为：—XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=1024m 修改完重启tomcat 服务，一切正常。