無法啟動嵌入式tomcat Spring boot

Question

我正在開發 Spring Boot Gradle 應用程序。 當我嘗試通過執行 booRun 將其作為戰爭運行時，我的應用程序拋出錯誤。 錯誤說：無法啟動嵌入式 tomcat。 build.gradle 文件的內容：

    group 'com.example'
    version '1.0-SNAPSHOT'



bootRepackage {
    mainClass = 'com.ex.MainClass'
}


apply plugin: 'war'
apply plugin: 'propdeps'

war {
    baseName = 'abc'
    archiveName 'abc.war'

}

repositories{
//    mavenLocal()
    mavenCentral()
}


dependencies {

        compile("org.springframework.boot:spring-boot-starter-web")
        compile("org.springframework.boot:spring-boot-starter-data-jpa")
        compile("io.springfox:springfox-swagger2:2.7.0")
        compile("io.springfox:springfox-swagger-ui:2.7.0")
        compile fileTree(dir:"lib", include:"*.jar")
        compile('org.springframework.boot:spring-boot-starter-mail')
        optional("org.springframework.boot:spring-boot-configuration-processor")
        compile("org.springframework.boot:spring-boot-starter-tomcat")
        compile "io.springfox:springfox-swagger2:2.7.0"
        compile 'io.springfox:springfox-swagger-ui:2.7.0'
        compile("org.springframework.boot:spring-boot-starter-amqp")
    }

   compileJava.dependsOn(processResources)

整個堆棧跟蹤如下：

org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:536) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at com.ex.MainClass.main(MainClass.java:38) [main/:na]
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:123) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:84) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:554) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:179) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    ... 8 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.startup.Tomcat.start(Tomcat.java:344) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:99) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
    ... 13 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Tomcat]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    ... 15 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    ... 17 common frames omitted
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
    ... 19 common frames omitted

bootRun FAILED

編輯：添加主類定義：

@SpringBootApplication
@EnableAsync
@EnableCaching
@EnableScheduling
public class MainClass extends SpringBootServletInitializer {

    public static final Logger logger = LoggerFactory.getLogger(MainClass.class);

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

    public static void main(String[] args) {
        SpringApplication.run(MainClass.class, args);

    }
}

誰能告訴我為什么我的應用程序無法在嵌入式 tomcat 上啟動？

謝謝

Answer 1

我無法發表評論。 因此，如果您使用的是嵌入式 tomcat，則不需要 Tomcat 依賴項（spring-boot-starter-tomcat），因為它已經內置了“spring-boot-starter-web”。 嘗試刪除此依賴項。

Answer 2

我遇到了同樣的問題，通過更換端口解決了。

當我將應用程序作為 Spring Application 運行時，我通常使用端口 9000 和 9001 進行管理，但是當我嘗試在 Tomcat 上運行它時，它失敗了，出現了與您發布的相同的異常。 將 application.properties 中的兩個端口更改為 8080 解決了這個問題。

Answer 3

就我而言，我正在運行此命令

mvn spring-boot:run -Dmaven.tomcat.port=8081 -Dspring.config.location=file:[Project Root Dir]\src\main\resources -Dspring.profiles.active=dev -DskipTests > log.log

原來我只是忘了在末尾添加反斜杠

\src\main\resources

因此它找不到配置文件。

對我來說修復就是這樣，所以我現在有以下代碼。

mvn spring-boot:run -Dmaven.tomcat.port=8081 -Dspring.config.location=file:[Project Root Dir]\src\main\resources\ -Dspring.profiles.active=dev -DskipTests > log.log