maven error using intellij is referencing itself

Question

I have this 2 simple pom.xml main parent project and module which the project is using main project 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/xsd/maven-4.0.0.xsd">



    <modelVersion>4.0.0</modelVersion>

    <groupId>com.clouddispatcher</groupId>
    <artifactId>clouddispatcher</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>aws-manager</module>
    </modules>
    <dependencies>
        <dependency>
            <groupId>com.clouddispatcher</groupId>
            <artifactId>aws-manager</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <properties>
        <aws.java.sdk.version>1.11.875</aws.java.sdk.version>
    </properties>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencyManagement>
        <dependencies>

            <dependency>
                <groupId>com.amazonaws</groupId>
                <artifactId>aws-java-sdk</artifactId>
                <version>${aws.java.sdk.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

and the module 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">
    <parent>
        <artifactId>clouddispatcher</artifactId>
        <groupId>com.clouddispatcher</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>aws-manager</artifactId>
    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
        </dependency>
    </dependencies>
</project>

now when I run :

mvn clean install

I keep getting this error :

The build could not read 1 project -> [Help 1]
  
  The project com.clouddispatcher:aws-manager:1.0-SNAPSHOT (C:\Dev\my\java\clouddispatcher\aws-manager\pom.xml) has 1 error
    'dependencies.dependency. com.clouddispatcher:aws-manager:1.0-SNAPSHOT' for com.clouddispatcher:aws-manager:1.0-SNAPSHOT is referencing itself. @ com.clouddispatcher:clouddispatcher:1.0-SNAPSHOT, C:\Dev\my\java\clouddispatcher\pom.xml, line 23, column 21
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.
For more information about the errors and possible solutions, please read the following articles:
[Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException

Why does your parent has a dependency on a module? Does not make sense. — khmarbaise
– khmarbaise, Commented Oct 7, 2020 at 14:34
in parent class im using : AWSManager awsManager = new AWSManager(); which is the module — user63898
– user63898, Commented Oct 7, 2020 at 14:39
Your parent module which has the packaging pom does not contain any source code so it does not makes sense...Best would be to make an example project on github... — khmarbaise
– khmarbaise, Commented Oct 7, 2020 at 14:45

JF Meier · Accepted Answer · 2020-10-07 15:47:53Z

7

Let me explain the points of khmarbaise in more detail:

Parents cannot have Java classes. You need to remove the classes from the parent.
You cannot define circular dependencies, i.e. if A is a parent of B, it cannot have B as dependency.

You need to refactor your project to meet these criteria, e.g. by moving the classes from the parent to a second module.

answered Oct 7, 2020 at 15:47

JF Meier

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