Issue
I'm having this problem with Github Actions (continues integration) where the project i made in maven doesn't succeed because the POM is referencing itself. However i have no idea how to fix this.
I have 4 modules in my project.
Pac - Parent, uses client,server,shared,UI
Client - uses shared
Server - uses client, shared
Shared - uses nothing
UI - uses client, shared
Github Actions after pushing:
[FATAL] 'dependencies.dependency.[fhict:client:1.0-SNAPSHOT]' for fhict:client:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 37, column 21
[FATAL] 'dependencies.dependency.[fhict:server:1.0-SNAPSHOT]' for fhict:server:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 43, column 21
[FATAL] 'dependencies.dependency.[fhict:shared:1.0-SNAPSHOT]' for fhict:shared:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 31, column 21
@
Error: The build could not read 3 projects -> [Help 1]
Error:
Error: The project fhict:client:1.0-SNAPSHOT (D:\a\Pacman-Multiplayer\Pacman-Multiplayer\client\pom.xml) has 1 error
Error: 'dependencies.dependency.[fhict:client:1.0-SNAPSHOT]' for fhict:client:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 37, column 21
Error:
Error: The project fhict:server:1.0-SNAPSHOT (D:\a\Pacman-Multiplayer\Pacman-Multiplayer\server\pom.xml) has 1 error
Error: 'dependencies.dependency.[fhict:server:1.0-SNAPSHOT]' for fhict:server:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 43, column 21
Error:
Error: The project fhict:shared:1.0-SNAPSHOT (D:\a\Pacman-Multiplayer\Pacman-Multiplayer\shared\pom.xml) has 1 error
Error: 'dependencies.dependency.[fhict:shared:1.0-SNAPSHOT]' for fhict:shared:1.0-SNAPSHOT is referencing itself. @ fhict:Pac:1.0-SNAPSHOT, D:\a\Pacman-Multiplayer\Pacman-Multiplayer\pom.xml, line 31, column 21
Error:
Error: To see the full stack trace of the errors, re-run Maven with the -e switch.
Error: Re-run Maven using the -X switch to enable full debug logging.
Error:
Error: For more information about the errors and possible solutions, please read the following articles:
Error: [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
Error: Process completed with exit code 1.
Pac 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>fhict</groupId>
<artifactId>Pac</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>client</module>
<module>server</module>
<module>shared</module>
<module>UI</module>
</modules>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>shared</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>client</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>server</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
Client 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">
<parent>
<groupId>fhict</groupId>
<artifactId>Pac</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>client</artifactId>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.eclipse.jetty.websocket</groupId>
<artifactId>javax-websocket-client-impl</artifactId>
<version>9.4.15.v20190215</version>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>shared</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
</dependencies>
</project>
Server 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">
<parent>
<groupId>fhict</groupId>
<artifactId>Pac</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>server</artifactId>
<dependencies>
<dependency>
<groupId>org.eclipse.jetty.websocket</groupId>
<artifactId>javax-websocket-server-impl</artifactId>
<version>9.4.15.v20190215</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.13</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>shared</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>client</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
</dependencies>
</project>
Shared 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">
<parent>
<groupId>fhict</groupId>
<artifactId>Pac</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>shared</artifactId>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>9</source>
<target>9</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.16</version>
</dependency>
</dependencies>
</project>
UI 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">
<parent>
<artifactId>Pac</artifactId>
<groupId>fhict</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>UI</artifactId>
<properties>
<codeVersion>11</codeVersion>
<openfxVersion>11.0.2</openfxVersion>
<mavenVersion>3.8.0</mavenVersion>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>${openfxVersion}</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-graphics</artifactId>
<version>${openfxVersion}</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>${openfxVersion}</version>
</dependency>
<!-- Junit5 for unit testing -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.6.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>client</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>fhict</groupId>
<artifactId>shared</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
Solution
Don't add modules as dependencies in the parent project.
Just add them as modules.
Answered By - J Fabian Meier