Apache Tomcat 启动异常：servlet 映射 URL 模式无效

On September 7, 2023 at 09:40:41.498, a severe error occurred during the invocation of the method 'manageApp' in the RMI TCP Connection (3)-127.0.0.1. The error message states that an IllegalStateException occurred while starting a child component.

The stack trace shows that the error originated from the 'addChildInternal' method in the 'ContainerBase' class. It then propagated to the 'manageApp' method in the 'HostConfig' class.

Further investigation reveals that the error is caused by an IllegalArgumentException, which states that the servlet mapping's URL pattern '/Studentcontroller.action' is invalid. This exception occurred in the 'addServletMappingDecoded' method in the 'StandardContext' class.

As a result of this error, the component 'StandardEngine[Catalina].StandardHost[localhost].StandardContext[/demo1_war_exploded]' failed to start, leading to a LifecycleException.

The stack trace suggests that the error occurred while attempting to start an application or context in Apache Tomcat. The exact cause of the error may require further investigation into the configuration and setup of the application.