java – get rid of POM not found warning for org.eclipse.m2e:lifecycle-mapping-ThrowExceptions

Exception or error:

With intent to get m2e 1.0 working correctly I have had to specify the lifecycle mapping:

    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.eclipse.m2e</groupId>
                <artifactId>lifecycle-mapping</artifactId>
                <version>1.0.0</version>
                <configuration>
                    <lifecycleMappingMetadata>
                        <pluginExecutions>
                            <pluginExecution>
                                <pluginExecutionFilter>
                                    <groupId>org.bsc.maven</groupId>
                                    <artifactId>maven-processor-plugin</artifactId>
                                    <versionRange>[2.0.2,)</versionRange>
                                    <goals>
                                        <goal>process</goal>
                                    </goals>
                                </pluginExecutionFilter>
                                <action>
                                    <execute />
                                </action>
                            </pluginExecution>
                        </pluginExecutions>                         
                    </lifecycleMappingMetadata>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>

But then I get this warning:

 [WARNING] The POM for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 is missing, no dependency information available
 [WARNING] Failed to retrieve plugin descriptor for org.eclipse.m2e:lifecycle-mapping:1.0.0: Plugin org.eclipse.m2e:lifecycle-mapping:1.0.0 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0

if I run some specific maven task for example mvn clean install findbugs:findbugs (If I run only mvn clean install then there is no such message)

I know that the problem is that this POM does not exists, because it is only defined to hold the mapping information. (m2e lifecycle-mapping not found)

Anyway, I want to keep my build clean, without any warnings, so how can I get rid of this specific one? (My CI server checks that there is no warning.)

I use Maven 3.0.2 and tried Maven 3.0.3 too, but the same result.

How to solve:

My team works around this problem by wrapping the relevant configuration in a profile:

<profile>
  <id>only-eclipse</id>
  <activation>
    <property>
      <name>m2e.version</name>
    </property>
  </activation>
  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.eclipse.m2e</groupId>
          <artifactId>lifecycle-mapping</artifactId>
          <version>1.0.0</version>
          <configuration>
            ...
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</profile>

Answer:

This a known bug with WONTFIX resolution. The suggested solution is the simplest in my opinion:

mvn archetype:generate -DgroupId=org.eclipse.m2e -DartifactId=lifecycle-mapping \
 -Dversion=1.0.0 -DarchetypeArtifactId=maven-archetype-mojo

and install this project.

Answer:

This solution is now deprecated, I would recommend using the “profile” solution by @ctrueden which is the accepted answer!

While not the most clean solution, when you use a repository manager in your company or are on your own, in the mean time you may do this:
– Checkout https://github.com/mfriedenhagen/dummy-lifecycle-mapping-plugin.
– Run mvn install when you are on your own
– Run mvn deploy -DaltDeploymentRepository=REPO_ID::default::YOUR_THIRDPARTY_REPO_URL when you have a repository manager like Nexus or Artifactory.
– See https://github.com/mfriedenhagen/dummy-lifecycle-mapping-plugin/blob/master/README.creole as well.

Regards
Mirko

Answer:

m2eclipse 1.7.0 introduced an alternative, namely an XML processing instruction.

In the original example, you would simply “annotate” every <execution> of the maven-processor-plugin’s process goal with

<?m2e execute?>

See the release notes for more details on the syntax and further options.

Answer:

Now there’s now better solution (for the error messages in Eclipse only).

Press CTR+1 on the error Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:buildnumber-maven-plugin:1.1:create-timestamp (execution: default-create-timestamp, phase: validate) and then select this option:

enter image description here

This works with org.eclipse.m2e.editor.xml_1.2.0.20120903-1050.jar plugin (maybe earlier also)

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