Maven 3 warnings re 'build.plugins.plugin.version'

[Robinyo]

Hi,

mvn clean install

Output:

[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com.oreilly.rest.workbook:jaxrs-2.0-workbook-ex03_1:war:2.0
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 50, column 21
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 58, column 21
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-deploy-plugin is missing. @ line 111, column 21
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]

For plug-in's that have no version:

mvn help:describe -DartifactId=maven-compiler-plugin -DgroupId=org.apache.maven.plugins

You get:

Name: Apache Maven Compiler Plugin
Description: The Compiler Plugin is used to compile the sources of your
  project.
Group Id: org.apache.maven.plugins
Artifact Id: maven-compiler-plugin
Version: 3.6.0
Goal Prefix: compiler

Add a 'version' element after the 'plugin' 'artifactId' in the example's pom.xml file:

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

I also bumped the 'source and 'target' to match RESTEasy.

Cheers
Rob