title: The Tomcat connector configured to listen on port 8080 failed to start
body: <p>I just downloaded this project:</p>
  
  <p><a href="https://github.com/oktadeveloper/okta-spring-boot-2-angular-5-example" rel="noreferrer">https://github.com/oktadeveloper/okta-spring-boot-2-angular-5-example</a></p>
  
  <p>explained on this tutorial:</p>
  
  <p><a href="https://developer.okta.com/blog/2017/12/04/basic-crud-angular-and-spring-boot" rel="noreferrer">https://developer.okta.com/blog/2017/12/04/basic-crud-angular-and-spring-boot</a></p>
  
  <p>But when I try to run the server with the recommended command:</p>
  
  <pre><code>./mvnw spring-boot:run
  </code></pre>
  
  <p>I get the following output:</p>
  
  <pre><code>David@HP /cygdrive/d/wamp64/www/external/okta.example.com/server
  $ ./mvnw spring-boot:run
  /cygdrive/d/wamp64/www/external/okta.example.com/server
  [INFO] Scanning for projects...
  [INFO]
  [INFO] ----------------------&lt; com.okta.developer:demo &gt;-----------------------
  [INFO] Building demo 0.0.1-SNAPSHOT
  [INFO] --------------------------------[ jar ]---------------------------------
  [INFO]
  [INFO] &gt;&gt;&gt; spring-boot-maven-plugin:2.0.1.RELEASE:run (default-cli) &gt; test-compile @ demo &gt;&gt;&gt;
  [INFO]
  [INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ demo ---
  [INFO] Using 'UTF-8' encoding to copy filtered resources.
  [INFO] Copying 1 resource
  [INFO] Copying 0 resource
  [INFO]
  [INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ demo ---
  [INFO] Nothing to compile - all classes are up to date
  [INFO]
  [INFO] --- maven-resources-plugin:3.0.1:testResources (default-testResources) @ demo ---
  [INFO] Using 'UTF-8' encoding to copy filtered resources.
  [INFO] skip non existing resourceDirectory D:\wamp64\www\external\okta.example.com\server\src\test\resources
  [INFO]
  [INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) @ demo ---
  [INFO] Nothing to compile - all classes are up to date
  [INFO]
  [INFO] &lt;&lt;&lt; spring-boot-maven-plugin:2.0.1.RELEASE:run (default-cli) &lt; test-compile @ demo &lt;&lt;&lt;
  [INFO]
  [INFO]
  [INFO] --- spring-boot-maven-plugin:2.0.1.RELEASE:run (default-cli) @ demo ---
  
    .   ____          _            __ _ _
   /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
   \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    '  |____| .__|_| |_|_| |_\__, | / / / /
   =========|_|==============|___/=/_/_/_/
   :: Spring Boot ::        (v2.0.1.RELEASE)
  
  2018-07-12 20:35:06.400  INFO 2812 --- [           main] com.okta.developer.demo.DemoApplication  : Starting DemoApplication on HP with PID 2812 (D:\wamp64\www\external\okta.example.com\server\target\classes started by David in D:\wamp64\www\external\okta.example.com\server)
  2018-07-12 20:35:06.410  INFO 2812 --- [           main] com.okta.developer.demo.DemoApplication  : No active profile set, falling back to default profiles: default
  2018-07-12 20:35:06.499  INFO 2812 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@ae5e109: startup date [Thu Jul 12 20:35:06 CDT 2018]; root of context hierarchy
  2018-07-12 20:35:08.603  INFO 2812 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'httpRequestHandlerAdapter' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]]
  2018-07-12 20:35:09.470  INFO 2812 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$29541950] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
  2018-07-12 20:35:10.064  INFO 2812 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
  2018-07-12 20:35:10.114  INFO 2812 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
  
  ...
  
  Using generated security password: 4f87a125-b4d8-47c0-9a24-bb5fb3b2a658
  
  2018-07-12 20:35:17.428  INFO 2812 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: org.springframework.security.web.util.matcher.AnyRequestMatcher@1, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@3052460, org.springframework.security.web.context.SecurityContextPersistenceFilter@76eee741, org.springframework.security.web.header.HeaderWriterFilter@622ee9f2, org.springframework.security.web.authentication.logout.LogoutFilter@59d663e0, org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter@a2d3781, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@7492ef4f, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@77d8457b, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@1e249f41, org.springframework.security.web.session.SessionManagementFilter@43e1a956, org.springframework.security.web.access.ExceptionTranslationFilter@7130b0d2, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@384e11db]
  2018-07-12 20:35:17.539  INFO 2812 --- [           main] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 2 endpoint(s) beneath base path '/actuator'
  2018-07-12 20:35:17.558  INFO 2812 --- [           main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator/health],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(javax.servlet.http.HttpServletRequest,java.util.Map&lt;java.lang.String, java.lang.String&gt;)
  2018-07-12 20:35:17.558  INFO 2812 --- [           main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator/info],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(javax.servlet.http.HttpServletRequest,java.util.Map&lt;java.lang.String, java.lang.String&gt;)
  2018-07-12 20:35:17.558  INFO 2812 --- [           main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto protected java.util.Map&lt;java.lang.String, java.util.Map&lt;java.lang.String, org.springframework.boot.actuate.endpoint.web.Link&gt;&gt; org.springframework.boot.actuate.endpoint.web.servlet.WebMvcEndpointHandlerMapping.links(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
  2018-07-12 20:35:17.660  INFO 2812 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
  2018-07-12 20:35:17.665  INFO 2812 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'dataSource' has been autodetected for JMX exposure
  2018-07-12 20:35:10.114  INFO 2812 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.29
  2018-07-12 20:35:17.684  INFO 2812 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
  2018-07-12 20:35:17.755 ERROR 2812 --- [           main] o.apache.catalina.core.StandardService   : Failed to start connector [Connector[HTTP/1.1-8080]]
  
  org.apache.catalina.LifecycleException: Failed to start component [Connector[HTTP/1.1-8080]]
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.apache.catalina.core.StandardService.addConnector(StandardService.java:225) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:256) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:198) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.startWebServer(ServletWebServerApplicationContext.java:300) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
          at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at com.okta.developer.demo.DemoApplication.main(DemoApplication.java:23) [classes/:na]
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172]
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172]
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172]
          at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172]
          at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:496) [spring-boot-maven-plugin-2.0.1.RELEASE.jar:2.0.1.RELEASE]
          at java.lang.Thread.run(Thread.java:748) [na:1.8.0_172]
  Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed
          at org.apache.catalina.connector.Connector.startInternal(Connector.java:1020) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          ... 19 common frames omitted
  Caused by: java.net.BindException: Address already in use: bind
          at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_172]
          at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_172]
          at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_172]
          at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_172]
          at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_172]
          at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1150) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:591) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          at org.apache.catalina.connector.Connector.startInternal(Connector.java:1018) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
          ... 20 common frames omitted
  
  2018-07-12 20:35:17.770  INFO 2812 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
  2018-07-12 20:35:17.815  INFO 2812 --- [           main] ConditionEvaluationReportLoggingListener :
  
  Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  2018-07-12 20:35:17.820 ERROR 2812 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   :
  
  ***************************
  APPLICATION FAILED TO START
  ***************************
  
  Description:
  
  The Tomcat connector configured to listen on port 8080 failed to start. The port may already be in use or the connector may be misconfigured.
  
  Action:
  
  Verify the connector's configuration, identify and stop any process that's listening on port 8080, or configure this application to listen on another port.
  
  2018-07-12 20:35:17.820  INFO 2812 --- [           main] ConfigServletWebServerApplicationContext : Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@ae5e109: startup date [Thu Jul 12 20:35:06 CDT 2018]; root of context hierarchy
  2018-07-12 20:35:17.825  INFO 2812 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
  2018-07-12 20:35:17.825  INFO 2812 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans
  2018-07-12 20:35:17.835  INFO 2812 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
  2018-07-12 20:35:17.835  INFO 2812 --- [           main] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed drop of schema as part of SessionFactory shut-down'
  2018-07-12 20:35:17.850  INFO 2812 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
  2018-07-12 20:35:17.860  INFO 2812 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
  [WARNING]
  java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke (Method.java:498)
      at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:496)
      at java.lang.Thread.run (Thread.java:748)
  Caused by: org.springframework.boot.web.embedded.tomcat.ConnectorStartFailedException: Connector configured to listen on port 8080 failed to start
      at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.checkThatConnectorsHaveStarted (TomcatWebServer.java:228)
      at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start (TomcatWebServer.java:203)
      at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.startWebServer (ServletWebServerApplicationContext.java:300)
      at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh (ServletWebServerApplicationContext.java:162)
      at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:553)
      at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh (ServletWebServerApplicationContext.java:140)
      at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:759)
      at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:395)
      at org.springframework.boot.SpringApplication.run (SpringApplication.java:327)
      at org.springframework.boot.SpringApplication.run (SpringApplication.java:1255)
      at org.springframework.boot.SpringApplication.run (SpringApplication.java:1243)
      at com.okta.developer.demo.DemoApplication.main (DemoApplication.java:23)
      at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke (Method.java:498)
      at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:496)
      at java.lang.Thread.run (Thread.java:748)
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 19.171 s
  [INFO] Finished at: 2018-07-12T20:35:17-05:00
  [INFO] ------------------------------------------------------------------------
  [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.1.RELEASE:run (default-cli) on project demo: An exception occurred while running. null: InvocationTargetException: Connector configured to listen on port 8080 failed to start -&gt; [Help 1]
  [ERROR]
  [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
  [ERROR] Re-run Maven using the -X switch to enable full debug logging.
  [ERROR]
  [ERROR] For more information about the errors and possible solutions, please read the following articles:
  [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
  </code></pre>
  
  <p>As you can see, there is one line that says:</p>
  
  <pre><code>The Tomcat connector configured to listen on port 8080 failed to start. 
  </code></pre>
  
  <p>Any idea on how to make the server work?</p>
  
  <p>Thanks!</p>