解决程序启动报错org.springframework.context.ApplicationContextException: Unable to start web server问题

一、场景

1、该项目在Linux和本机电脑上启动都正常

2、在另一台电脑上启动就报错

3、代码都是同一份，没有差别

二、报错信息

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:157)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
    at com.xxx.RobotManagerSvr.main(RobotManagerSvr.java:32)
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:206)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:154)
    ... 8 common frames omitted

三、原因

导入spring-boot-starter-tomcat依赖时定义的scope导致

原依赖导入配置

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-tomcat</artifactId>
    <!--是provided导致-->
	<scope>provided</scope>
</dependency>

四、解决

调整后依赖导入配置

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-tomcat</artifactId>
    <!--测试时先注释该配置-->
	<!--<scope>provided</scope>-->
</dependency>

注：

• 本机就算是provided也能正常启动
• 另一台电脑上就不行
• 应该是运行环境上的差异

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。

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