Maven cycle dependency

Question

I'm new to Maven and Im trying to make my own Java EE Maven project with some frameworks... I have started with two modules and one parent module. The problem is that Im getting this error when Im issue mvn clean:

[ERROR] The projects in the reactor contain a cyclic reference: Edge between 'Vertex{label='org.tepo:Jporto-web:0.0.1-SNAPSHOT'}' and 'Vertex{label='org.tepo:Jporto-ejb:0.0.1-SNAPSHOT'}' introduces to cycle in the graph org.tepo:Jporto-ejb:0.0.1-SNAPSHOT --> org.tepo:Jporto-web:0.0.1-SNAPSHOT --> org.tepo:Jporto-ejb:0.0.1-SNAPSHOT -> [Help 1]

I know what cycle dependency is, but I can not see such a thing in my poms. Here They are: parent POM:

<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>org.tepo</groupId>
  <artifactId>Jporto</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>jsf library tutto</name>
  <description>fiesta prego grande</description>
  <dependencies>

        <dependency>
        <groupId>org.tepo</groupId>
        <artifactId>Jporto-ejb</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <type>ejb</type>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.tepo</groupId>
        <artifactId>Jporto-web</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <type>war</type>
        <scope>compile</scope>
    </dependency>
 </dependencies>

  <modules>
    <module>Jporto-ejb</module>
    <module>Jporto-web</module>
  </modules>

  <build>  
  <plugins>  
    <plugin>  
      <artifactId>maven-compiler-plugin</artifactId>  
      <inherited>true</inherited>  
      <configuration>  
        <source>1.6</source>  
        <target>1.6</target>  
        <encoding>UTF-8</encoding>  
        <version>2.5.1</version>
      </configuration>  
    </plugin>  
    <plugin>  
      <artifactId>maven-resources-plugin</artifactId>  
      <configuration>  
        <encoding>UTF-8</encoding>  
      </configuration>  
    </plugin>  
    <plugin>  
      <artifactId>maven-ejb-plugin</artifactId>  
      <inherited>true</inherited>  
      <configuration>  
        <ejbVersion>3.1</ejbVersion>  
      </configuration>  
    </plugin>  
  </plugins>  
</build>  

</project>

WEB module:

<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>
    <artifactId>Jporto</artifactId>
    <groupId>org.tepo</groupId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>

  <artifactId>Jporto-web</artifactId>
  <groupId>org.tepo</groupId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <dependencies>    
    <dependency>  
  <groupId>javax.jms</groupId>  
  <artifactId>jms</artifactId>  
  <version>1.1</version>  
  <scope>provided</scope>  
</dependency> 

<dependency>  
  <groupId>javax.transaction</groupId>  
  <artifactId>jta</artifactId>  
  <version>1.1</version>  
  <scope>provided</scope>  
</dependency>  

<dependency>  
  <groupId>org.hibernate</groupId>  
  <artifactId>hibernate-core</artifactId>  
  <version>4.0.0.Final</version>  
  <scope>provided</scope>  
</dependency>  

<dependency>  
  <groupId>org.hibernate</groupId>  
  <artifactId>hibernate-entitymanager</artifactId>  
  <version>4.0.0.Final</version>  
  <scope>provided</scope>  
</dependency>  

<dependency>  
  <groupId>org.hibernate.javax.persistence</groupId>  
  <artifactId>hibernate-jpa-2.0-api</artifactId>  
  <version>1.0.1.Final</version>  
  <scope>provided</scope>  
</dependency>  

<dependency>  
  <groupId>org.jboss.spec.javax.servlet</groupId>  
  <artifactId>jboss-servlet-api_3.0_spec</artifactId>  
  <version>1.0.0.Final</version>  
  <scope>provided</scope>  
</dependency>  

<dependency>  
  <groupId>javax.faces</groupId>  
  <artifactId>javax.faces-api</artifactId>  
  <version>2.1</version>  
  <scope>provided</scope>  
</dependency>  



  </dependencies>
</project>

EJB module:

<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>
    <artifactId>Jporto</artifactId>
    <groupId>org.tepo</groupId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>

  <groupId>org.tepo</groupId>
  <artifactId>Jporto-ejb</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>ejb</packaging>

  <dependencies>  

    <dependency>
        <groupId>org.jboss.as</groupId>
        <artifactId>jboss-as-ejb3</artifactId>
        <version>7.1.0.CR1b</version>
        <type>jar</type>
        <scope>provided</scope>
    </dependency>
  </dependencies>
</project>

Please, can ypu explain to me why Im getting this error ? also, eclipse gives this error on pom file of web module: Missing artifact org.tepo:Jporto-web:war:0.0.1-SNAPSHOT:compile and Missing artifact org.tepo:Jporto-ejb:ejb:0.0.1-SNAPSHOT:compile on web module... Thank you for your help!

Solution

Your parent pom depends on your modules which depend on your parent pom.

What you could have done is add to your parent pom

<modules>
   <module>module1</module>
   <module>module2</module>
</module>

Your modules have to be subdirectories with the names you give them.