ClassNotFoundException using Spring Boot and Spring Cloud - spring-boot

Question

I am trying to use feature from Spring Cloud (ex: Feign or Zipkin Client) in a Spring Boot micro-service. Whenever I introduce the Spring Cloud dependencies into the pom.xml I get the following error at startup:
java.lang.ClassNotFoundException: com.fasterxml.jackson.core.Versioned
at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_162]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
... 36 common frames omitted
Below is a sample pom.xml causing this. I am currently on Spring Boot 2.0.0.RELEASE and Spring Cloud Finchley.M8.
What am I doing wrong? Should I switch to another version of Spring Cloud?
UPDATE: It's not me who's doing it wrong, even Spring Initializr projects demonstrate this issue. To repro:
Go to https://start.spring.io/.
Enter Web, JPA and Feign as dependencies
Download the project.
Launch in IDE (in my case Spring Tool Suite) and the exception will be thrown at startup.
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>io.urig</groupId>
<artifactId>inventory</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>inventory</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.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>
<spring-cloud.version>Finchley.M8</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.retry</groupId>
<artifactId>spring-retry</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</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>

Answer 1

Turns out the issue was a corrupt Maven package. Deleting my .m2\repository folder and running mvn spring-boot:run to downloaded dependencies and run my app resolved the issue.