MNG-6189

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As discussed in:

https://stackoverflow.com/questions/46742407/some-problems-were-encountered-while-building-the-effective-model-for when you see the warning:

[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com.bitplan.antlr:com.bitplan.antlr:jar:0.0.1
[WARNING] Reporting configuration should be done in <reporting> section, not in maven-site-plugin <configuration> as reportPlugins parameter. @ line 213, column 20
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 

You have run into an issue that is explained in:

What to do?

You get this error if your maven pom.xml configuration looks like this:

original pom.xml

<project>
  <build>
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.0</version>
        <configuration>
          <!-- configuration of reports to be included in site -->
          <reportPlugins>
            <plugin>
            <!-- report plugin 1 -->
            ...
            </plugin>
            <plugin>
            <!-- report plugin 2 -->
            ...
            </plugin>
            ...
          <reportPlugins>
        </configuration>
      </plugin>
    <plugins>
  </build>
</project>

upgrade org.apache.maven.plugins version

You first might want to upgrade your plugin version. You can find the current version at search.maven.org

<project>
  <build>
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.6</version>
        <configuration>
          <!-- configuration of reports to be included in site -->
          <reportPlugins>
            <plugin>
            <!-- report plugin 1 -->
            ...
            </plugin>
            <plugin>
            <!-- report plugin 1 -->
            ...
            </plugin>
          <reportPlugins>
        </configuration>
      </plugin>
    <plugins>
  </build>
</project>

add a reporting node

Then you might want to create a new node <reporting></reporting> (it it does not exist yet) directly unter the <project><project> node:

<project>
  <reporting>
  </reporting>
</project>

cut & paste the list of report plugins

Now add a <plugins></plugins> node to the reporting node cut&paste the list of report plugins from the configuration above into it like this:

<project>
  <reporting>
    <plugins>
      <plugin>
        <!-- report plugin 1 -->
        ...
        </plugin>
        <plugin>
        <!-- report plugin 2 -->
        ...
        </plugin>
        ...
    <plugins>
  </reporting>
</project>

remove configuration node if empty

In the plugins list in the build part only:

<project>
  <build>
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.0</version>
      </plugin>
    <plugins>
  </build>
</project>

keep configuration node if non empty

is needed or if you have any non report configurations:

<project>
  <build>
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.6</version>
        <configuration>
        ...
        </configuration>
      </plugin>
    <plugins>
  </build>
</project>

Check result

run

mvn site

to check that the error went away and the site plugin is working as expected.

Example

See https://github.com/BITPlan/com.bitplan.antlr/blob/master/pom.xml for a complete pom.xml example