Need help to start with vaading and spring boot.

Vaadin 6 / 7 / 8
1

Just cloned the example from the tutorial at https://github.com/vaadin/spring-tutorial
When I run mvn spring-boot:run, I get this error:

. ____ _ __ _ _
/\ / ’ __ _ () __ __ _ \ \ \
( ( )__ | '_ | '| | ’ / ` | \ \ \
\/ )| |)| | | | | || (| | ) ) ) )
’ || .__|| ||| |_, | / / / /
=========||==============|/=////
:: Spring Boot :: (v1.5.1.RELEASE)

2017-03-10 19:00:35.669 INFO 7712 — [ main]
o.v.spring.tutorial.TutorialApplication : No active profile set, falling back to default profiles: default
2017-03-10 19:00:35.760 INFO 7712 — [ main]
s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@5e57643e: startup date [Fri Mar 10 19:00:35 CET 2017]
; root of context hierarchy
2017-03-10 19:00:36.500 ERROR 7712 — [ main]
o.s.boot.SpringApplication : Application startup failed

java.lang.IllegalStateException: Error processing condition on com.vaadin.spring.boot.internal.VaadinServletConfiguration.vaadinServlet
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:64) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:102) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:178) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:140) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:116) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:320) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:686) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:524) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.vaadin.spring.tutorial.TutorialApplication.main(TutorialApplication.java:10) [classes/:na]

Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean’s type failed
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.validate(OnBeanCondition.java:312) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.<init>(OnBeanCondition.java:302) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:109) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

... 16 common frames omitted

Caused by: org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanTypeDeductionException: Failed to deduce bean type for com.vaadin.spring.boot.internal.VaadinServletConfiguration.vaadinServlet
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.addDeducedBeanTypeForBeanMethod(OnBeanCondition.java:365) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.addDeducedBeanType(OnBeanCondition.java:349) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.<init>(OnBeanCondition.java:296) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

... 18 common frames omitted

Caused by: java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_102]

at java.lang.ClassLoader.defineClass(Unknown Source) ~[na:1.8.0_102]

at java.security.SecureClassLoader.defineClass(Unknown Source) ~[na:1.8.0_102]

at java.net.URLClassLoader.defineClass(Unknown Source) ~[na:1.8.0_102]

at java.net.URLClassLoader.access$100(Unknown Source) ~[na:1.8.0_102]

at java.net.URLClassLoader$1.run(Unknown Source) ~[na:1.8.0_102]

at java.net.URLClassLoader$1.run(Unknown Source) ~[na:1.8.0_102]

at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_102]

at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_102]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

at org.springframework.util.ClassUtils.forName(ClassUtils.java:250) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanSearchSpec.addDeducedBeanTypeForBeanMethod(OnBeanCondition.java:359) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]

... 20 common frames omitted

Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet
at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_102]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_102]

... 34 common frames omitted

2017-03-10 19:00:36.507 INFO 7712 — [ main]
s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@5e57643e: startup date [Fri Mar 10 19:00:35 CET 2017]
; root of context hierarchy
2017-03-10 19:00:36.510 WARN 7712 — [ main]
s.c.a.AnnotationConfigApplicationContext : Exception thrown from LifecycleProcessor on context close

java.lang.IllegalStateException: LifecycleProcessor not initialized - call ‘refresh’ before invoking lifecycle methods via the context: org.springframework.context.annotation.AnnotationConfigApplicationContext@5e57643e: startup date [Fri Mar 10 19:00:35 CET 2017]
; root of context hierarchy
at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:417) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1002) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:961) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:794) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.vaadin.spring.tutorial.TutorialApplication.main(TutorialApplication.java:10) [classes/:na]

2017-03-10 19:00:36.511 ERROR 7712 — [ main]
o.s.b.f.s.DefaultListableBeanFactory : Destroy method on bean with name ‘org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory’ threw an exception

java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call ‘refresh’ before multicasting events via the context: org.springframework.context.annotation.AnnotationConfigApplicationContext@5e57643e: startup date [Fri Mar 10 19:00:35 CET 2017]
; root of context hierarchy
at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:404) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.ApplicationListenerDetector.postProcessBeforeDestruction(ApplicationListenerDetector.java:97) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:253) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578) [spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554) [spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:961) [spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523) [spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:968) [spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1033) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1009) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:961) [spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]

at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:794) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]

at org.vaadin.spring.tutorial.TutorialApplication.main(TutorialApplication.java:10) [classes/:na]

Exception in thread “main” java.lang.NoClassDefFoundError: javax/servlet/Servlet
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getDeclaredMethods(Unknown Source)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:697)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:640)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:609)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1484)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:425)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:395)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:515)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:508)
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1189)
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:862)
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:848)
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:834)
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:788)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:325)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151)
at org.vaadin.spring.tutorial.TutorialApplication.main(TutorialApplication.java:10)
Caused by: java.lang.ClassNotFoundException: javax.servlet.Servlet
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 24 more

2

It is actually a spring-boot problem. After I spent 3 hours and could not fix it, I am giving up on Spring and going to take the standard vaadin route.

3

Just a follow up. Somebody told me to try with gradle, and funnily enough, it is working with gradle. So I may give it another try.

4

Vaadin (also version 8) works fine with Spring Boot and Maven. But it is of course possible to have errors in both java code and pom.xml. When it doesn’t work just for you, that is most likely the cause, especially I’d suspect your pom.xml when it works with gradle. However, not posting your sources makes it impossible for others to know.

5

Well, I just regenerated a spring-starter app from the initializer and I got this pom:

<?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>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-bom</artifactId>
                <version>8.0.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

[code]
. ____ _ __ _ _
/\ / ’ __ _ () __ __ _ \ \ \
( ( )__ | '_ | '| | ’ / ` | \ \ \
\/ )| |)| | | | | || (| | ) ) ) )
’ || .__|| ||| |_, | / / / /
=========||==============|/=////
:: Spring Boot :: (v1.5.2.RELEASE)

Exception in thread “main” java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethods(Class.java:1975)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:697)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:640)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:609)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1484)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:425)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:395)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:515)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:508)
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1189)
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:862)
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:848)
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:834)
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:788)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:325)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151)
at com.example.DemoApplication.main(DemoApplication.java:10)
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
… 36 more
[/code]Obviously something is wrong with maven. I need to start adding the dependencies manually to no end. If I choose gradle, I can run the app without any problem… Anyway, this is not a Spring-boot forum.
Thanks for replying.

6

Using the pom.xml above I can’t even build. And I can’t see a spring-boot:run target anywhere. So there is something fishy here.

I just generated a pom.xml myself, all default, except adding vaadin support (only).

It seems exactly like the pom.xml you use, except it doesn’t inlcude flyway and web (which is implicit with vaadin included).

So when I strip out flyway and web from yours, it seems exactly identical to mine. Still mine works, and yours don’t. Weird.

What happens if you generate a new pom, with vaadin only, all other options left default, can you build and run then?

7

And after lunch it runs flawlessly …

8

Gave it another try:

[code]

<?xml version="1.0" encoding="UTF-8"?>


4.0.0

<groupId>com.example</groupId>
<artifactId>demo10</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>demo10</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.2.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-bom</artifactId>
            <version>8.0.0</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
[/code]Now run it with mvnw spring-boot:run 
  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.2.RELEASE)

[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:527)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: javax/servlet/Servlet
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
        at java.lang.Class.getDeclaredMethods(Class.java:1975)
        at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
        at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
        at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)
        at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:570)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:697)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:640)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:609)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1484)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:425)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:395)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:515)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:508)
        at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1189)
        at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:862)
        at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:848)
        at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:834)
        at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:788)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:325)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151)
        at com.example.Demo10Application.main(Demo10Application.java:10)
        at org.spri

Still no luck.

I have given up on maven. I will continue with gradle, which is working.

9

Does your Maven installation work otherwise, eg. you can run other projects? What happens if you use the Vaadin archetype (https://vaadin.com/framework/get-started) and try jetty:run? What happens if you just use Maven instead of the mvnw-script that boot provides?

10

And finally - what happens if you create the project in Idea community edition? There is a wizard in there which does exactly the same as Spring Initializr, there is a builtin Maven that should work, and a builtin jdk. Should be pretty bulletproof.

11

Standard vaadin application is working.
Vaadin application + spring-boot is not working when using maven, but it does when using gradle.

12

I did not see any wizard that would allow me to configure spring-boot + vaadin…

13

I figure the standard Vaadin app from the Vaadin archetype working proves your maven installation is ok. And fresh out of spring initializr the spring version should run too. I can’t really see any reason why it shouldn’t other than the mvnw-script somehow messing up the classpath. Because the servlet api is obviously not on the classpath, when running. Are you building using the mvnw script also? Can you check if mvnw dependency:tree and mvn dependency:tree gives the same output?

Regarding the Spring wizard in Idea, I guess it’s in the Ultimate ed. only, then. Does nothing else than the one you can run from your browser and download the pom, though.

14


mvnw dependency:tree
 and
mvn dependency:tree
 not only do give the same output, they also behave the same with respect to running the application.

15

With my setup Servlet.class lives within tomcat-embed-core. Does that appear in your tree? Does it show up when running with

mvn -e -X spring-boot:run
16

Do you build from the command-line too?

Win? Mac? Linux?

17

I have attached the result of running the different maven commands. May be you can figure out what is going wrong. I am on Win 10 btw.

31502.txt (4.82 KB)
31503.txt (4.82 KB)
31504.txt (108 KB)

18

I can see tomcat-embed, which includes both Servlet and HttpServlet, so it should work. Maybe check for any classpath in your environment vars? Ask on stackoverflow? Try clean install and spring-boot:run with Idea embedded jdk and Maven? Reinstall Maven? I can’t come up with anything more …

19

Yeah, I thought maybe my repo is messed up, but usually it complains directly about bad jar files, but not this time. Anyhow, gradle works well and I am sticking to it for now…
thanks.