Launching Spring application Address already in use

Question

I have this error launching my spring application:

java -jar target/gs-serving-web-content-0.1.0.jar    .   ____          _            __ _ _  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )   '  |____| .__|_| |_|_| |_\__, | / / / /  =========|_|==============|___/=/_/_/_/  :: Spring Boot ::             (v0.5.0.M6)  2013-12-23 00:23:09.466  INFO 19252 --- [           main] hello.Application                        : Starting Application on mbp-de-antoine.home with PID 19252 (/Users/antoine/Documents/workspace-sts-3.4.0.RELEASE/springapp/target/gs-serving-web-content-0.1.0.jar started by antoine) 2013-12-23 00:23:09.511  INFO 19252 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@24024c39: startup date [Mon Dec 23 00:23:09 CET 2013]; root of context hierarchy 2013-12-23 00:23:10.910  INFO 19252 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat 2013-12-23 00:23:10.910  INFO 19252 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/7.0.42 2013-12-23 00:23:11.045  INFO 19252 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext 2013-12-23 00:23:11.046  INFO 19252 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1537 ms 2013-12-23 00:23:11.274  INFO 19252 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet' 2013-12-23 00:23:11.274  INFO 19252 --- [ost-startStop-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started 2013-12-23 00:23:11.409  INFO 19252 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2013-12-23 00:23:11.634  INFO 19252 --- [ost-startStop-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/greeting],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String hello.GreetingController.greeting(java.lang.String,org.springframework.ui.Model) 2013-12-23 00:23:11.717  INFO 19252 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2013-12-23 00:23:11.717  INFO 19252 --- [ost-startStop-1] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2013-12-23 00:23:12.406  INFO 19252 --- [ost-startStop-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 1132 ms 2013-12-23 00:23:12.417 ERROR 19252 --- [           main] o.a.coyote.http11.Http11NioProtocol      : Failed to start end point associated with ProtocolHandler ["http-nio-8080"]  java.net.BindException: Address already in use     at sun.nio.ch.Net.bind0(Native Method)     at sun.nio.ch.Net.bind(Net.java:444)     at sun.nio.ch.Net.bind(Net.java:436)     at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)     at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)     at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:473)     at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:617)     at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:444)     at org.apache.catalina.connector.Connector.startInternal(Connector.java:1010)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.StandardService.startInternal(StandardService.java:459)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:58)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:53)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:259)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:140)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:158)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:135)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:552)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:293)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:749)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:738)     at hello.Application.main(Application.java:12)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:606)     at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)     at java.lang.Thread.run(Thread.java:744)  2013-12-23 00:23:12.419 ERROR 19252 --- [           main] o.apache.catalina.core.StandardService   : Failed to start connector [Connector[org.apache.coyote.http11.Http11NioProtocol-8080]]  org.apache.catalina.LifecycleException: Failed to start component [Connector[org.apache.coyote.http11.Http11NioProtocol-8080]]     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)     at org.apache.catalina.core.StandardService.startInternal(StandardService.java:459)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:58)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:53)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:259)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:140)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:158)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:135)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:552)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:293)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:749)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:738)     at hello.Application.main(Application.java:12)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:606)     at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)     at java.lang.Thread.run(Thread.java:744) Caused by: org.apache.catalina.LifecycleException: service.getName(): "Tomcat";  Protocol handler start failed     at org.apache.catalina.connector.Connector.startInternal(Connector.java:1017)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     ... 24 common frames omitted Caused by: java.net.BindException: Address already in use     at sun.nio.ch.Net.bind0(Native Method)     at sun.nio.ch.Net.bind(Net.java:444)     at sun.nio.ch.Net.bind(Net.java:436)     at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)     at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)     at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:473)     at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:617)     at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:444)     at org.apache.catalina.connector.Connector.startInternal(Connector.java:1010)     ... 25 common frames omitted  2013-12-23 00:23:12.420  INFO 19252 --- [           main] o.apache.catalina.core.StandardService   : Stopping service Tomcat 2013-12-23 00:23:12.430  INFO 19252 --- [           main] nitializer$AutoConfigurationReportLogger :    ========================= AUTO-CONFIGURATION REPORT =========================   Positive matches: -----------------     MessageSourceAutoConfiguration       - @ConditionalOnMissingBean (types: org.springframework.context.MessageSource; SearchStrategy: all) found no beans (OnBeanCondition)     PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer       - @ConditionalOnMissingBean (types: org.springframework.context.support.PropertySourcesPlaceholderConfigurer; SearchStrategy: current) found no beans (OnBeanCondition)     ThymeleafAutoConfiguration       - @ConditionalOnClass classes found: org.thymeleaf.spring3.SpringTemplateEngine (OnClassCondition)       - @ConditionalOnClass classes found: org.thymeleaf.spring3.SpringTemplateEngine (OnClassCondition)     ThymeleafAutoConfiguration.DefaultTemplateResolverConfiguration       - @ConditionalOnMissingBean (names: defaultTemplateResolver; SearchStrategy: all) found no beans (OnBeanCondition)     ThymeleafAutoConfiguration.ThymeleafDefaultConfiguration       - @ConditionalOnMissingBean (types: org.thymeleaf.spring3.SpringTemplateEngine; SearchStrategy: all) found no beans (OnBeanCondition)     ThymeleafAutoConfiguration.ThymeleafViewResolverConfiguration       - @ConditionalOnClass classes found: javax.servlet.Servlet (OnClassCondition)       - @ConditionalOnClass classes found: javax.servlet.Servlet (OnClassCondition)     ThymeleafAutoConfiguration.ThymeleafViewResolverConfiguration#thymeleafViewResolver       - @ConditionalOnMissingBean (names: thymeleafViewResolver; SearchStrategy: all) found no beans (OnBeanCondition)     DispatcherServletAutoConfiguration       - found web application StandardServletEnvironment (OnWebApplicationCondition)       - @ConditionalOnClass classes found: org.springframework.web.servlet.DispatcherServlet (OnClassCondition)       - found web application StandardServletEnvironment (OnWebApplicationCondition)       - @ConditionalOnClass classes found: org.springframework.web.servlet.DispatcherServlet (OnClassCondition)       - @ConditionalOnBean (types: org.springframework.boot.context.embedded.EmbeddedServletContainerFactory; SearchStrategy: all) found the following [tomcatEmbeddedServletContainerFactory] (OnBeanCondition)     DispatcherServletAutoConfiguration#dispatcherServlet       - no DispatcherServlet found (DispatcherServletAutoConfiguration.DefaultDispatcherServletCondition)     EmbeddedServletContainerAutoConfiguration       - found web application StandardServletEnvironment (OnWebApplicationCondition)       - found web application StandardServletEnvironment (OnWebApplicationCondition)     EmbeddedServletContainerAutoConfiguration.EmbeddedTomcat       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.apache.catalina.startup.Tomcat (OnClassCondition)       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.apache.catalina.startup.Tomcat (OnClassCondition)       - @ConditionalOnMissingBean (types: org.springframework.boot.context.embedded.EmbeddedServletContainerFactory; SearchStrategy: current) found no beans (OnBeanCondition)     ServerPropertiesAutoConfiguration#serverProperties       - @ConditionalOnMissingBean (types: org.springframework.boot.context.embedded.properties.ServerProperties; SearchStrategy: all) found no beans (OnBeanCondition)     WebMvcAutoConfiguration       - found web application StandardServletEnvironment (OnWebApplicationCondition)       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.springframework.web.servlet.DispatcherServlet,org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter (OnClassCondition)       - found web application StandardServletEnvironment (OnWebApplicationCondition)       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.springframework.web.servlet.DispatcherServlet,org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter (OnClassCondition)       - @ConditionalOnMissingBean (types: org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; SearchStrategy: all) found no beans (OnBeanCondition)     WebMvcAutoConfiguration#hiddenHttpMethodFilter       - @ConditionalOnMissingBean (types: org.springframework.web.filter.HiddenHttpMethodFilter; SearchStrategy: all) found no beans (OnBeanCondition)     WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#defaultViewResolver       - @ConditionalOnMissingBean (types: org.springframework.web.servlet.view.InternalResourceViewResolver; SearchStrategy: all) found no beans (OnBeanCondition)   Negative matches: -----------------     RabbitAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.amqp.rabbit.core.RabbitTemplate,com.rabbitmq.client.Channel (OnClassCondition)     AopAutoConfiguration       - required @ConditionalOnClass classes not found: org.aspectj.lang.annotation.Aspect,org.aspectj.lang.reflect.Advice (OnClassCondition)     BatchAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.batch.core.launch.JobLauncher (OnClassCondition)     JpaRepositoriesAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.data.jpa.repository.JpaRepository (OnClassCondition)     MongoRepositoriesAutoConfiguration       - required @ConditionalOnClass classes not found: com.mongodb.Mongo,org.springframework.data.mongodb.repository.MongoRepository (OnClassCondition)     DataSourceAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType (OnClassCondition)     DataSourceTransactionManagerAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.jdbc.core.JdbcTemplate,org.springframework.transaction.PlatformTransactionManager (OnClassCondition)     JmsTemplateAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.jms.core.JmsTemplate,javax.jms.ConnectionFactory (OnClassCondition)     DeviceResolverAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.mobile.device.DeviceResolverHandlerInterceptor,org.springframework.mobile.device.DeviceHandlerMethodArgumentResolver (OnClassCondition)     HibernateJpaAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean,org.springframework.transaction.annotation.EnableTransactionManagement,javax.persistence.EntityManager,org.hibernate.ejb.HibernateEntityManager (OnClassCondition)     ReactorAutoConfiguration       - required @ConditionalOnClass classes not found: reactor.spring.context.config.EnableReactor (OnClassCondition)     ThymeleafAutoConfiguration.ThymeleafSecurityDialectConfiguration       - required @ConditionalOnClass classes not found: org.thymeleaf.extras.springsecurity3.dialect.SpringSecurityDialect (OnClassCondition)     ThymeleafAutoConfiguration.ThymeleafWebLayoutConfiguration       - required @ConditionalOnClass classes not found: nz.net.ultraq.thymeleaf.LayoutDialect (OnClassCondition)     EmbeddedServletContainerAutoConfiguration.EmbeddedJetty       - required @ConditionalOnClass classes not found: org.eclipse.jetty.server.Server,org.eclipse.jetty.util.Loader (OnClassCondition)     MultipartAutoConfiguration       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.springframework.web.multipart.support.StandardServletMultipartResolver (OnClassCondition)       - @ConditionalOnClass classes found: javax.servlet.Servlet,org.springframework.web.multipart.support.StandardServletMultipartResolver (OnClassCondition)       - @ConditionalOnBean (types: javax.servlet.MultipartConfigElement; SearchStrategy: all) found no beans (OnBeanCondition)     WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#beanNameViewResolver       - @ConditionalOnBean (types: org.springframework.web.servlet.View; SearchStrategy: all) found no beans (OnBeanCondition)     WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#viewResolver       - @ConditionalOnBean (types: org.springframework.web.servlet.View; SearchStrategy: all) found no beans (OnBeanCondition)     WebSocketAutoConfiguration       - required @ConditionalOnClass classes not found: org.springframework.web.socket.WebSocketHandler (OnClassCondition)    java.lang.reflect.InvocationTargetException     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:606)     at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)     at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embdedded Tomcat     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:138)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:552)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:293)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:749)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:738)     at hello.Application.main(Application.java:12)     ... 6 more Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embdedded Tomcat     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:85)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:53)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:259)     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:140)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:158)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:135)     ... 13 more Caused by: java.lang.IllegalStateException: Tomcat connector in failed state     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:81)     ... 18 more 

I think this is because my port is used. My port 8080 is used so I try the port 8181 I have no application on the port 8181

in the tomcat server.xml I set the port to 8181 but the problem persist

I find this post:

Alternate port for Tomcat (not 8080) when starting with Maven?

But I have the same problem after launching mvn -Dmaven.tomcat.port=8181 tomcat:run-war

I don't realy understand how to maven is linked to the tomcat server This is my pom.xml

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <modelVersion>4.0.0</modelVersion>      <groupId>org.springframework</groupId>     <artifactId>gs-serving-web-content</artifactId>     <version>0.1.0</version>      <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>0.5.0.M6</version>     </parent>      <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.thymeleaf</groupId>             <artifactId>thymeleaf-spring3</artifactId>         </dependency>     </dependencies>      <properties>         <start-class>hello.Application</start-class>     </properties>      <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build>      <repositories>         <repository>             <id>spring-milestone</id>             <url>http://repo.spring.io/libs-milestone</url>             <snapshots>                 <enabled>false</enabled>             </snapshots>         </repository>     </repositories>      <pluginRepositories>         <pluginRepository>             <id>spring-milestone</id>             <url>http://repo.spring.io/libs-milestone</url>             <snapshots>                 <enabled>false</enabled>             </snapshots>         </pluginRepository>     </pluginRepositories>  </project> 

Thanks for your help

Answer 1

Spring Boot uses embedded Tomcat by default, but it handles it differently without using tomcat-maven-plugin. To change the port use --server.port parameter for example:

java -jar target/gs-serving-web-content-0.1.0.jar --server.port=8181 

Update. Alternatively put server.port=8181 into application.properties (or application.yml).

Answer 2

Run the following command to search for the process that is using the port

lsof -i :<portNumber> | grep LISTEN 

in your case this will be -->

lsof -i :8080 | grep LISTEN java    78960 xyxss  119u  IPv6 0x6c20d372bc88c27d      0t0  TCP *:8092 (LISTEN) 

The 78960 is the process id, use the following command to kill the process

kill -9 78960 

Launch the application again.