unable to start springboot server generated from swagger - spring-boot

Question

I am new to swagger, i had to write swagger for a given POJO (just POJO) and implement API for it. So by using swagger editor I was able to write swagger processed with no errors and then did
1. Generate Server from menu and selected spring
2. Generate Client from menu and selected client
I opened the generated java API client and build successfully.
I opened the generated spring server in IntelliJ and try to run the server and I got below error ...
2016-08-18 17:16:53.188 INFO 17456 --- [ main] io.swagger.Swagger2SpringBoot : Starting Swagger2SpringBoot on AMUSLT17507 with PID 17456 (C:\Users\SGattu1\Downloads\spring-server-generated\spring-server\target\classes started by SGattu1 in C:\Users\SGattu1\Downloads\spring-server-generated\spring-server)
2016-08-18 17:16:53.216 INFO 17456 --- [ main] io.swagger.Swagger2SpringBoot : No active profile set, falling back to default profiles: default
2016-08-18 17:16:53.337 INFO 17456 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#6d3af739: startup date [Thu Aug 18 17:16:53 PDT 2016]; root of context hierarchy
2016-08-18 17:16:55.535 ERROR 17456 --- [ main] o.s.boot.SpringApplication : Application startup failed
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_73]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_73]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_73]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:612) ~[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) ~[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510) ~[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:241) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1069) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1042) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) ~[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
at io.swagger.Swagger2SpringBoot.main(Swagger2SpringBoot.java:24) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73]
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) [idea_rt.jar:na]
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_73]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_73]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_73]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_73]
... 27 common frames omitted
Please let me know if I am missing anything over here, appreciate your help.
EDITED
pom.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.swagger</groupId>
<artifactId>swagger-spring</artifactId>
<packaging>jar</packaging>
<name>swagger-spring</name>
<version>1.0.0</version>
<properties>
<java.version>1.8</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
<springfox-version>2.5.0</springfox-version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<build>
<sourceDirectory>src/main/java</sourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!--SpringFox dependencies -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox-version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-joda</artifactId>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
</dependency>
</dependencies>
</project>
I try to generate spring server for the examples default, heroku, instagram, twitter they have provided and for these also getting same error.

Answer 1

I think the issue is the provided scope for tomcat. This would assume that you are deploying the app into an existing tomcat instance. Can you try removing that scope, refresh the project, and try running again?