Plugin execution not covered by lifecycle configuration maven error

Question

i imported an existing maven project but i'm getting some errors in the pom.xml :

Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-

 compiler-plugin:2.3.2:compile (execution: default-compile, phase: compile) pom.xml 

 /org.squashtest.csp.tools.unittest line 50 Maven Project Build Lifecycle Mapping Problem

but i can't understand why ,

Here's the pom.xml :

 <?xml version="1.0"?>
 <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>squashtest-csp-tools</artifactId>
    <groupId>org.squashtest.tm</groupId>
    <version>1.2.0.RELEASE</version>
</parent>
<artifactId>org.squashtest.csp.tools.unittest</artifactId>
<name>Squashtest CSP - Tools module - Unit tests library</name>
<description>Library  of classes used for unit-testing other Squashtest        
     components</description>

<dependencies>
    <!-- ====== GROOVY ====== -->
    <dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <scope>compile</scope>
    </dependency>
    <!-- ====== /GROOVY ====== -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>org.squashtest.org.hibernate.core</artifactId>
        <version>${hibernate.version}</version>
        <scope>compile</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.unitils</groupId>
        <artifactId>unitils-database</artifactId>
        <version>3.1</version>
        <scope>compile</scope>
        <optional>true</optional>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-nop</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>
<build>
    <sourceDirectory>src/main/groovy</sourceDirectory>
    <testSourceDirectory>src/test/groovy</testSourceDirectory>
    <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <executions><execution></execution></executions>
      <version>2.3.2</version>
      </plugin> 
    </plugins>
 </build>
</project>

Thank you in advance

Answer 1

This is an issue with Groovy maven configuration. More specifically, m2e connector issues which are, generally speaking, a nightmare. This link contains good info about the m2e connector mess.

Summary

To fix this, you can grab the m2e connector that springsource provides.

http://dist.springsource.org/release/GRECLIPSE/e4.2/

Details

To use it:

1. Click Help > Install new software...
2. Paste the URL above in the "Work With:" field
3. Expand "m2e Configurator for Groovy-Eclipse"
4. Choose the first option "Groovy-Eclipse m2e Integration" and install it

I would also recommend installing the "Groovy/Grails Tool Suite for Eclipse" (GGTS) from the Eclipse Marketplace. I just did both of these (installing GGTS then the connector) in Eclipse Kepler and it solved the exact issue you had, above. This fix also works in Juno.