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【原】Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean

不忘初心 2021-12-04 围观() 评论() 点赞() 【JAVA开发】

简介：Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean，这就是典型的tomcat依赖没处理好导致的问题。

由于springboot项目内嵌了tomcat，所以一般都会将项目打包成jar包来进行发布，而并非以前的war包，但是公司有一个项目依旧将springboot项目打成war包，然后丢到tomcat容器中运行，这样就需要兼容本地启动调试和线上运行，涉及到tomcat依赖的地方就需要格外注意，一不小心就会导致有一边儿会启动失败。

整理之前的笔记，发现以前还真碰到过这个问题，本地能正常启动，但是发布到线上的时候就报错：Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean，这就是典型的tomcat依赖没处理好导致的问题。

.   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.4.RELEASE)
2020-12-18 09:14:06,263 default [background-preinit] INFO  o.h.v.i.u.Version 898 - HV000001: Hibernate Validator 6.1.5.Final 
2020-12-18 09:14:06,301 default [main] INFO  c.g.l.Application 936 - Starting Application on LAPTOP-9J4HVAON with PID 2568 (D:\workspace_idea\logistics\target\classes started by Administrator in D:\workspace_idea\logistics) 
2020-12-18 09:14:06,301 default [main] INFO  c.g.l.Application 936 - The following profiles are active: dev 
2020-12-18 09:14:07,692 default [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate 2327 - Multiple Spring Data modules found, entering strict repository configuration mode! 
2020-12-18 09:14:07,695 default [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate 2330 - Bootstrapping Spring Data Redis repositories in DEFAULT mode. 
2020-12-18 09:14:07,760 default [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate 2395 - Finished Spring Data repository scanning in 43ms. Found 0 Redis repository interfaces. 
2020-12-18 09:14:08,198 default [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker 2833 - Bean 'redisConfig' of type [com.gude.logistics.config.RedisConfig$$EnhancerBySpringCGLIB$$dfa45a1c] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
2020-12-18 09:14:08,221 default [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker 2856 - Bean 'org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler@2ffb3aec' of type [org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
2020-12-18 09:14:08,226 default [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker 2861 - Bean 'methodSecurityMetadataSource' of type [org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
2020-12-18 09:14:08,347 default [main] WARN  o.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContext 2982 - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean. 
2020-12-18 09:14:08,357 default [main] INFO  o.s.b.a.l.ConditionEvaluationReportLoggingListener 2992 - 
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 
2020-12-18 09:14:08,368 default [main] ERROR o.s.b.SpringApplication 3003 - Application run failed 
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:161)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
    at com.gude.logistics.Application.main(Application.java:12)
Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:205)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:177)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:158)
    ... 9 common frames omitted

因为线上已经使用了tomcat外部容器了，所以在打war包的时候就不在需要tomcat相关的jar包了，否则就会冲突。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <!--注释掉-->
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>