项目启动就直接报embedded.tomcat.TomcatEmbeddedServlet之类的问题及处理

在弄Spring Boot的时候，有时候莫名奇妙的出现了以下的问题，这里先把问题抛出来

#问题的异常信息呈现

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/backstage]]
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) [na:1.8.0_101]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) [na:1.8.0_101]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_101]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
	at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/backstage]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) [tomcat-embed-core-8.0.30.jar:8.0.30]
	... 6 common frames omitted
Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getJspConfigDescriptor()Ljavax/servlet/descriptor/JspConfigDescriptor;
	at org.apache.jasper.servlet.TldScanner.scanJspConfig(TldScanner.java:158) ~[tomcat-embed-jasper-8.0.30.jar:8.0.30]
	at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104) ~[tomcat-embed-jasper-8.0.30.jar:8.0.30]
	at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:103) ~[tomcat-embed-jasper-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5244) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	... 6 common frames omitted

2017-08-17 10:12:53.451 ERROR 6912 --- [           main] org.apache.catalina.core.ContainerBase   : A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[na:1.8.0_101]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[na:1.8.0_101]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:441) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:769) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:344) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:89) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:76) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:457) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:168) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:160) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) [spring-context-4.2.4.RELEASE.jar:4.2.4.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.2.RELEASE.jar:1.3.2.RELEASE]
	at com.dj.Application.main(Application.java:20) [classes/:na]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) [tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_101]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_101]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_101]
	at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_101]
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:924) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871) ~[tomcat-embed-core-8.0.30.jar:8.0.30]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.0.30.jar:8.0.30]
	... 6 common frames omitted

通过排查得出了如下几种状况及对应解决方法

1maven配置有问题，把spring boot的内置容器干掉了

<dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-web</artifactId>
                    <version>${springboot.version}</version>
                    <!--不须要打包成一个war包,或者说不用内置的spring容器，-->
                    <exclusions>
                        <exclusion>
                            <groupId>org.springframework.boot</groupId>
                            <artifactId>spring-boot-starter-tomcat</artifactId>
                        </exclusion>
                    </exclusions>
                </dependency>

像这种的，是缺乏了容器，只要在再加个容器的依赖就能跑了

2和IDE有关，如Intellij集成maven引入jar包时scope设置的问题

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-tomcat</artifactId>
      <version>1.2.3.RELEASE</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat.embed</groupId>
      <artifactId>tomcat-embed-jasper</artifactId>
      <version>7.0.68</version>
      <scope>provided</scope>
    </dependency>

这种的注释掉scope项就好

3可能上一个启动还没彻底关闭，就从新启动了，这种状况下也会出现，并且貌似一出现就连续好几个，得等一会的样子