小编Jam*_*lik的帖子

我有一个REST-full Web服务,使用Spring Boot 1.2.0-RELEASE实现,偶尔会在启动时抛出以下异常.

03-Feb-2015 11:42:23.697 SEVERE [localhost-startStop-1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: 
 org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
...
Caused by: java.lang.IllegalStateException: Duplicate Filter registration for 'springSecurityFilterChain'. Check to ensure the Filter is only configured once.
        at org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer.registerFilter(AbstractSecurityWebApplicationInitializer.java:215)
        at org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer.insertSpringSecurityFilterChain(AbstractSecurityWebApplicationInitializer.java:147)
...

当我说"偶尔"时,我的意思是简单地重新启动Tomcat服务器(版本8.0.17)将产生此异常或将成功加载而不会出现问题.

这是一个基于Spring Boot构建的Servlet 3.0应用程序,因此我们没有传统的web.xml文件.相反,我们使用Java初始化我们的servlet.

package com.v.dw.webservice;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

public class WebXml extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(ApplicationConfig.class);
    }
}

我们还在mvn spring-boot:run开发期间利用该命令,并且在以这种方式运行时尚未出现此竞争条件.我们的配置的"根"和maven使用的主要方法在同一个类中:

package com.v.dw.webservice;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Value; …