Spring Boot War deployed to Tomcat

Question

I am trying to deploy a Spring Boot app to Tomcat  because I want to deploy to AWS  I created a WAR file  but it does not seem to run on Tomcat  even though it is visible   Details  0  Here is my app    Configuration  ComponentScan  EnableAutoConfiguration public class App       public static void main String   args            SpringApplication run SampleController class  args             Controller  EnableAutoConfiguration public class SampleController        RequestMapping   help        ResponseBody     String home             String input    Hi  Please use  tag   check  and  close  resources            return input            application properties has following   server port   port 7777     After reading a number of pages and question-answers I added following to my POM    http   maven apache org xsd maven-4 0 0 xsd       4 0 0   lt groupId gt com niewlabs lt  groupId gt   lt artifactId gt highlighter lt  artifactId gt   lt version gt 1 0-SNAPSHOT lt  version gt    lt packaging gt war lt  packaging gt    lt properties gt       lt java version gt 1 8 lt  java version gt   lt  properties gt       lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 1 1 9 RELEASE lt  version gt   lt  parent gt       lt dependencies gt       lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt  dependency gt       lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt   lt  dependencies gt     I ran mvn package and got WAR file  size 250Mb   which I put into  webapps  folder  I started Tomcat and am able to see my app listed  in my case   highlighter-1 0-SNAPSHOT   Clicking on the link for the app results in  Status 404  page  When I run Spring Boot app just by itself  without container it runs on localhost 7777  but there is nothing there when I run it in Tomcat     Update  There is another reference  Not sure how useful it is

User · Answer

public class Application extends SpringBootServletInitializer     just extends the SpringBootServletInitializer  It will works in your AWS tomcat

User · Answer

Solution for people using Gradle  Add plugin to build gradle  apply plugin   war    Add provided dependency to tomcat  dependencies          other dependencies     providedRuntime  org springframework boot spring-boot-starter-tomcat

User · Answer

I think you re confused by different paradigms here  First  war files and server deployment -- those things belong to Java Enterprise Edition  Java EE   These concepts have no real place in a spring-boot application  which follows a different model    Spring-boot is responsible for creating an embedded container and running your services within it directly from standard jar files  although it can do a lot more   I think the intent of this model is to support micro-service development -- where each service has its own container and is completely self contained  You can use your code to generate Java EE apps too  but that would be silly considering that spring-boot is a lot easier  for certain types of application service    So  given this information you now have to decide what paradigm you re going to follow  and you need to follow that and only that   Spring-boot is executable -- you just have to run the main method in the App class which you can do from the command line or using your favourite IDE or maven or gradle  tip  maven is the right answer   This will bring up a tomcat server  by default  and your service will be available within it  Given the configuration you posted above your service should be available at  http   localhost 7777 context help -- the context is meant to be replaced with your context name  which you haven t shared   You aren t meant to be creating a war  running tomcat  or deploying anything  None of that is necessary in spring-boot  The packaging in your pom should be jar  not war and the scope of the spring-boot-starter-tomcat should be removed -- it certainly isn t provided   When you run your main method  the console output should tell you the context that you ve registered  use that to get the URL right   Having said all that  spring-boot has to exist in a JEE world for now  until it is widely adopted   For that reason  the spring people have documented an approach to building a war rather than an executable jar  for deployment to a servlet or JEE container  This allows a lot of the spring-boot tech to be used in environments where there are restrictions against using anything but wars  or ears   However  this is a just a response to the fact that such environments are quite common  and is not seen as a necessary  or even desirable  part of the solution

User · Answer

If you are creating a new app instead of converting an existing one  the easiest way to create WAR based spring boot application is through Spring Initializr   It auto-generates the application for you  By default it creates Jar  but in the advanced options  you can select to create WAR  This war can be also executed directly     Even easier is to create the project from IntelliJ IDEA directly      File   New Project   Spring Initializr

User · Answer

Hey make sure to do this changes to the pom xml   lt packaging gt war lt  packaging gt    in the dependencies section make sure to indicated the tomcat is provided so you dont need the embeded tomcat plugin        lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt               lt dependency gt           lt groupId gt org apache tomcat embed lt  groupId gt           lt artifactId gt tomcat-embed-jasper lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt           This is the whole pom xml   lt  xml version  1 0  encoding  UTF-8   gt   lt 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  gt       lt modelVersion gt 4 0 0 lt  modelVersion gt        lt groupId gt com example lt  groupId gt       lt artifactId gt demo lt  artifactId gt       lt version gt 0 0 1-SNAPSHOT lt  version gt       lt packaging gt war lt  packaging gt        lt name gt demo lt  name gt       lt description gt Demo project for Spring Boot lt  description gt        lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 1 4 0 RELEASE lt  version gt           lt relativePath  gt   lt  -- lookup parent from repository -- gt       lt  parent gt        lt properties gt           lt project build sourceEncoding gt UTF-8 lt  project build sourceEncoding gt           lt project reporting outputEncoding gt UTF-8 lt  project reporting outputEncoding gt           lt java version gt 1 8 lt  java version gt           lt start-class gt com example Application lt  start-class gt       lt  properties gt        lt dependencies gt           lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-web lt  artifactId gt           lt  dependency gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-test lt  artifactId gt               lt scope gt test lt  scope gt           lt  dependency gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt               lt scope gt provided lt  scope gt           lt  dependency gt                   lt dependency gt               lt groupId gt org apache tomcat embed lt  groupId gt               lt artifactId gt tomcat-embed-jasper lt  artifactId gt               lt scope gt provided lt  scope gt           lt  dependency gt               lt  dependencies gt        lt build gt           lt plugins gt               lt plugin gt                   lt groupId gt org springframework boot lt  groupId gt                   lt artifactId gt spring-boot-maven-plugin lt  artifactId gt               lt  plugin gt           lt  plugins gt       lt  build gt     lt  project gt    And the Application class should be like this   Application java  package com example   import org springframework boot SpringApplication  import org springframework boot autoconfigure SpringBootApplication  import org springframework boot builder SpringApplicationBuilder  import org springframework boot web support SpringBootServletInitializer    SpringBootApplication public class Application extends SpringBootServletInitializer                    Used when run as JAR             public static void main String   args            SpringApplication run Application class  args                         Used when run as WAR              Override     protected SpringApplicationBuilder configure SpringApplicationBuilder builder            return builder sources Application class              And you can add a controller for testing MyController java  package com example   import org springframework stereotype Controller  import org springframework web bind annotation RequestMapping  import org springframework web bind annotation ResponseBody    Controller public class MyController         RequestMapping   hi       public  ResponseBody String hiThere            return  hello world              Then you can run the project in a tomcat 8 version and access the controller like this  http   localhost 8080 demo hi  If for some reason you are not able to add the project to tomcat do a right click in the project and then go to the Build Path- configure build path- Project Faces  make sure only this 3 are selected  Dynamic web Module 3 1 Java 1 8 Javascript 1 0

User · Answer

This guide explains in detail how to deploy Spring Boot app on Tomcat  http   docs spring io spring-boot docs current reference htmlsingle  howto-create-a-deployable-war-file  Essentially I needed to add following class   public class WebInitializer extends SpringBootServletInitializer           Override     protected SpringApplicationBuilder configure SpringApplicationBuilder application            return application sources App class                 Also I added following property to POM    lt properties gt               lt start-class gt mypackage App lt  start-class gt   lt  properties gt

User · Answer

After following the guide  or using Spring Initializr   I had a WAR that worked on my local computer  but didn t work remote  running on Tomcat    There was no error message  it just said  Spring servlet initializer was found   but didn t do anything at all   17-Aug-2016 16 58 13 552 INFO  main  org apache catalina core StandardEngine startInternal Starting Servlet Engine  Apache Tomcat 8 5 4 17-Aug-2016 16 58 13 593 INFO  localhost-startStop-1  org apache catalina startup HostConfig deployWAR Deploying web application archive  opt tomcat webapps ROOT war 17-Aug-2016 16 58 16 243 INFO  localhost-startStop-1  org apache jasper servlet TldScanner scanJars At least one JAR was scanned for TLDs yet contained no TLDs  Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them  Skipping unneeded JARs during scanning can improve startup time and JSP compilation time    and  17-Aug-2016 16 58 16 301 INFO  localhost-startStop-1  org apache catalina core ApplicationContext log 2 Spring WebApplicationInitializers detected on classpath 17-Aug-2016 16 58 21 471 INFO  localhost-startStop-1  org apache catalina core ApplicationContext log Initializing Spring embedded WebApplicationContext 17-Aug-2016 16 58 25 133 INFO  localhost-startStop-1  org apache catalina core ApplicationContext log ContextListener  contextInitialized   17-Aug-2016 16 58 25 133 INFO  localhost-startStop-1  org apache catalina core ApplicationContext log SessionListener  contextInitialized     Nothing else happened  Spring Boot just didn t run   Apparently I compiled the server with Java 1 8  and the remote computer had Java 1 7   After compiling with Java 1 7  it started working    lt properties gt       lt project build sourceEncoding gt UTF-8 lt  project build sourceEncoding gt       lt project reporting outputEncoding gt UTF-8 lt  project reporting outputEncoding gt       lt java version gt 1 7 lt  java version gt   lt  -- added this line -- gt       lt start-class gt myapp SpringApplication lt  start-class gt   lt  properties gt

User · Answer

Update 2018-02-03 with Spring Boot 1 5 8 RELEASE   In pom xml  you need to tell Spring plugin when it is building that it is a war file by change package to war  like this    lt packaging gt war lt  packaging gt    Also  you have to excluded the embedded tomcat while building the package by adding this        lt  -- to deploy as a war in tomcat -- gt       lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt    The full runable example is in here  https   www surasint com spring-boot-create-war-for-tomcat

User · Answer

Your Application java class should extend the SpringBootServletInitializer class ex   public class Application extends SpringBootServletInitializer

User · Answer

I had same problem and i find out solution by following this guide   I run with goal in maven      clean package   Its worked for me Thanq

User · Answer

If your goal is to deploy your Spring Boot application to AWS  Boxfuse gives you a very easy solution   All you need to do is   boxfuse run my-spring-boot-app-1 0 jar -env prod   This will    Fuse a minimal OS image tailor-made for your app  about 100x smaller than a typical Linux distribution  Push it to a secure online repository Convert it into an AMI in about 30 seconds Create and configure a new Elastic IP or ELB Assign a new domain name to it Launch one or more instances based on your new AMI   All images are generated in seconds and are immutable  They can be run unchanged on VirtualBox  dev  and AWS  test  amp  prod    All updates are performed as zero-downtime blue green deployments and you can also enable auto-scaling with just one command   Boxfuse also understands your Spring Boot config will automatically configure security groups and ELB health checks based upon your application properties   Here is a tutorial to help you get started  https   boxfuse com getstarted springboot  Disclaimer  I am the founder and CEO of Boxfuse

[spring] Spring Boot War deployed to Tomcat

Examples related to spring

Examples related to maven

Examples related to tomcat

Examples related to spring-boot