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Microservice project throws class not found on mvn package for classes present in commn-service

<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.microservice.test</groupId>
<artifactId>wallet-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>wallet-service</name>
<description>Wallet microservices</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR2</spring-cloud.version>
<jackson.version>2.9.0.pr3</jackson.version>
</properties>
<dependencies>
<dependency>
<groupId>com.microservice.test</groupId>
<artifactId>common-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<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>
I have created a project that is common-service and my every other projects uses classes from this project and it works fine but when create build of projects which uses common-service it throws classnotfoundexception for the classes which are present in common-service.
I have added dependency of common-service in other projects and added this project on build path also.

You didn't provide the pom of common-service. Is it of packaging type jar? Please ensure there is a <packaging>jar</packaging> in the other pom coordinates.
The dependencyManagement tag above is closed, but there is no opening.

failed to resolve dependencies in maven multi module project

I am posting this question even though there are other questions on this. However, I did not find any solution so far on this, hence posting this question.
I am getting this error :
Could not resolve dependencies for project vehicle-tracker:vehicle-simulator:jar:0.0.1-SNAPSHOT: Failed to collect dependencies at vehicle-tracker:common-libs:jar:0.0.1-SNAPSHOT: Failed to read artifact descriptor for vehicle-tracker:common-libs:jar:0.0.1-SNAPSHOT: Could not find artifact vehicle-tracker:vehicle-tracker:pom:0.0.1-SNAPSHOT
common-libs jar is available under
.m2\repository\vehicle-tracker\common-libs\0.0.1-SNAPSHOT
The project I am trying to build is dependent over common-libs jar but maven is failed to find in local maven repo.
I am attaching following POM.xml
Parent.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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>vehicle-tracker</groupId>
<artifactId>vehicle-tracker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<modules>
<module>common-libs</module>
<module>vehicle-simulator</module>
<module>tracker-dashboard</module>
</modules>
</project>
Common-libs 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>
<parent>
<groupId>vehicle-tracker</groupId>
<artifactId>vehicle-tracker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../vehicle-tracker</relativePath> <!-- lookup parent from repository -->
</parent>
<artifactId>common-libs</artifactId>
<name>common-libs</name>
<description>Common libraries for vehicle tracker</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
vehicle-simulator 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>
<parent>
<groupId>vehicle-tracker</groupId>
<artifactId>vehicle-tracker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../vehicle-tracker/</relativePath> <!-- lookup parent from repository -->
</parent>
<artifactId>vehicle-simulator</artifactId>
<name>vehicle-simulator</name>
<description>vehicle simulator for application</description>
<properties>
<java.version>1.8</java.version>
<swagger-version>2.9.2</swagger-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${swagger-version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${swagger-version}</version>
</dependency>
<dependency>
<artifactId>common-libs</artifactId>
<version>0.0.1-SNAPSHOT</version><!--${project.version}-->
<groupId>vehicle-tracker</groupId><!-- ${project.groupId} -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
I am not able to find where I am doing mistake in POM or else where ...so not able to build project vehicle-tracker.

I resolved the build error. Actually I was putting below in common-libs module's POM.xml :
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
This should be in the POM.xml of commons-lib module as it is creating spring-boot jar. Hence dependency was not available for dependent module.
After removing this block of configuration in POM.xml from commons-lib module, I am able to build the project without any issue(s).
Thank U All for looking in to this.
Just sharing this if any one having would face this knowingly or unknowingly.

Maven assembly plugin goal 'jar-with-dependencies' does not include a jar file from child pom

I've tried to find a proper solution to my question, but it looks like it is similar to the following one maven assembly include the current project jar in the final zip/tar.
The idea of a project is to have one parent pom and a couple of child ones.
I would like to have 'jar-with-dependencies' for each of child when I will execute 'mvn assembly:single' command from the root level.
So, what I have got so far:
If I execute mvn package and mvn assembly:single one by one, then first will be completed successfully and the second one with a warning that child project was not included. Since my module has not been included, I am not able to launch the target.
If I execute mvn package assembly:single, then required jar with all the dependencies will be created and I am able to launch the target.
I afraid that I have missed a configuration in one of my pom.xml. I will appreciate if someone could help me with that. I am adding a link on GitHub repository with this example.
btw, I'm using maven-assembly-plugin version 3.1.0
Thank you in advance, and I guess, I will need to buy a really good book about Maven.

The key point is disabling assembly execution for parent project: it can be achieved combining <skipAssembly> option, profiles section and properties section.
With the following pom files, it works fine.
Parent 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>com.slemarchand.samples.jarwithdependencies</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>parent</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<skip.assembly>true</skip.assembly>
</properties>
<modules>
<module>child1</module>
<module>child2</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<skipAssembly>${skip.assembly}</skipAssembly>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<profiles>
<profile>
<id>jar</id>
<activation>
<file>
<exists>${basedir}/src/main/java</exists>
</file>
</activation>
<properties>
<skip.assembly>false</skip.assembly>
</properties>
</profile>
</profiles>
</project>
Child 1 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>
<parent>
<groupId>com.slemarchand.samples.jarwithdependencies</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>child1</artifactId>
<version>1.0-SNAPSHOT</version>
<name>child1</name>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>25.1-jre</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
</project>
Child 2 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>
<parent>
<groupId>com.slemarchand.samples.jarwithdependencies</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>child2</artifactId>
<version>1.0-SNAPSHOT</version>
<name>child2</name>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
</dependencies>
<build>
</build>
</project>
You can find the sample project here: https://gitlab.com/slemarchand/jar-with-dependencies-multi-module-sample.

Thanks for the answers.
It turns out that if was misconfiguration in child pom.xml.
I didn't add definition of the plugin under the plugins section:
<build>
<plugins>
HERE
<plugins>
</build>
So it was properly described under <pluginManagement> and it blinds me...

how to spring-boot:run on root pom.xml from multi-module project

I have a multi-module project with Spring Boot.
My root pom.xml only contains this:
<?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.something</groupId>
<artifactId>my-application</artifactId>
<version>0.1.0</version>
<packaging>pom</packaging>
<modules>
<module>library</module>
<module>application</module>
</modules>
</project>
My spring-boot-maven-plugin is on application module as shown below:
<?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.something.tcc</groupId>
<artifactId>my-application-application</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.7.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<jsf.version>2.2.11</jsf.version>
</properties>
<dependencies>
<!-- use this for automatic hot deployment on code changes -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
</plugins>
</build>
</project>
So today, from my root directory, I have to execute my app like this:
mvn spring-boot:run -pl application
If I try mvn spring-boot:run, I receive the error:
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.7.RELEASE:run (default-cli) on project my-application-library: Unable to find a suitable main class, please add a 'mainClass' property -> [Help 1]
I'd like to know what I need to do in order to be able to execute exactly the following command in my root directory:
mvn spring-boot:run
EDIT: as per comment's suggestion I tried moving configuration from application module to root pom.xml, but I still receive the same error:
<?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.something</groupId>
<artifactId>my-application</artifactId>
<version>0.1.0</version>
<packaging>pom</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.7.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<!-- The main class to start by executing java -jar -->
<start-class>com.something.tcc.Main</start-class>
</properties>
<modules>
<module>library</module>
<module>application</module>
</modules>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
</plugins>
</build>
</project>
Thanks

To address this issue you only need to change configuration in spring-boot-maven-plugin in pom.xml.
Considering you have a spring boot multi-module project your project structure should be something like this
spring-boot-projcet
├─service
└─webapp
The straightforward and the simplest example which I have found was the project which was provided by Burkhard Graves
https://github.com/drahkrub/spring-boot-multi-module
To solve your problem add changes to pom.xml in parent module
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
Add chnages to pom.xml in webapp module
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<skip>false</skip>
</configuration>
</plugin>
</plugins>
</build>
With this setup the usual mvn clean spring-boot:run is possible in the root directory of the project.

you can define your main class with either start-class property or mainClass configuration xml tag in your pom.xml
Find the description here.

Building EAR from a single Maven project

There is a Maven project that used to have JAR packaging type. Now the project has evolved, and it is required that it be built as EAR, including the JAR proper and its dependencies altogether.
Does it necessarily mean I have to introduce the second POM with EAR packaging type? Is it possible to build JAR+EAR from a single Maven project? The reason behind that is that I don't really want to radically reorganize my repository structure.
If not possible, I guess I'd need to somehow reorganize project structure to make use of Maven modules. What (sub)module structure would you recommend in that case?

You will need 3 poms, here is a working example;
pom 1 is the parent
<?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.greg</groupId>
<artifactId>ear-example</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>ear-example</name>
<modules>
<module>example-jar</module>
<module>example-ear</module>
</modules>
</project>
pom 2 is the jar or war
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.greg</groupId>
<artifactId>ear-example</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>example-jar</artifactId>
<packaging>jar</packaging>
<name>com.greg</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
pom 3 is the ear which has a dependency to the jar/war and uses the ear plugin
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.greg</groupId>
<artifactId>ear-example</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>example-ear</artifactId>
<packaging>ear</packaging>
<dependencies>
<dependency>
<groupId>com.greg</groupId>
<artifactId>example-jar</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-ear-plugin</artifactId>
<version>2.10.1</version>
<configuration>
</configuration>
</plugin>
</plugins>
</build>
</project>

I think you can use maven war plugin to generate a single war file every time you build the project
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.3.2</version>
<!-- configuring the ear plugin -->
<configuration>
<modules>
<!-- all your modles -->
</modules>
</configuration>
</plugin>
</plugins>