这个问题是典型的 Spring 包冲突问题。
错误日志:
5:22:24.990 [main] ERROR o.apache.catalina.core.ContainerBase - A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [NonLoginAuthenticator[StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]]
at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:926)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:265)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:432)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486)
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123)
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104)
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:479)
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:211)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:182)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:160)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:420)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306)
at com.usvisatrack.data.Application.main(Application.java:18)
如果把上面的错误日志拉到最后。
我们会看到下面的信息:
Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1319)
The following method did not exist:
javax/servlet/ServletContext.getVirtualServerName()Ljava/lang/String;
The calling method's class, org.apache.catalina.authenticator.AuthenticatorBase, was loaded from the following location:
jar:file:/C:/Users/yhu/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.65/tomcat-embed-core-9.0.65.jar!/org/apache/catalina/authenticator/AuthenticatorBase.class
The called method's class, javax.servlet.ServletContext, is available from the following locations:
jar:file:/C:/Users/yhu/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar!/javax/servlet/ServletContext.class
jar:file:/C:/Users/yhu/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.65/tomcat-embed-core-9.0.65.jar!/javax/servlet/ServletContext.class
The called method's class hierarchy was loaded from the following locations:
javax.servlet.ServletContext: file:/C:/Users/yhu/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar
Action:
Correct the classpath of your application so that it contains compatible versions of the classes org.apache.catalina.authenticator.AuthenticatorBase and javax.servlet.ServletContext
上面的信息,明确的告诉我们是 servlet-api-2.5.jar 这个包和 Tomcate 里面的包冲突了。
问题和解决
Spring Boot 会嵌入使用 Tomcat,在使用的 Tomcat 中会加入符合版本的 servlet 。
如果在你自己的 Pom 文件中天了不同版本的 servlet 将会导致错误。
例如,我们的项目中就是因为包含有了这个包而导致了冲突。
修改的方法也非常简单,从 pom 文件中删除掉这个冲突的包就可以了。