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Re: [m2e-users] Debugging plugin execution errors 
Hi Alan,
have you checked that the project builds cleanly under command line maven & embedded maven through Run as ... > maven install to eliminate "easy" problems?
Do you have "m2e lfl4j over logback logging" feature installed? If you do, have checked the logs in .metadata/.plugins/org.eclipse.m2e.logback.configuration directory? You can also try increasing logging verbosity to DEBUG, using logback configuration file located in the latter directory. 

regards,
Rafał

On Sun 01 Apr 2012 10:31:00 AM CEST, Alan Egerton wrote:

Dear m2e-users,

I am struggling to understand why a plugin is failing to execute.  The
error I receive is "Error executing
(org.bsc.maven:maven-processor-plugin:2.0.5:process:process:generate-sources)",
but no further detail is given.  How can one debug plugin execution to
discover more about WHY a plugin failed to execute?

I am using m2e 1.1.0 on Eclipse Indigo 3.7.2.  The relevant parts of
my pom.xml are given below.

Thank you in advance for your help.

Kind regards,
-- Alan


<project ...>
   <build>
     <plugins>
       <plugin>
         <groupId>org.bsc.maven</groupId>
         <artifactId>maven-processor-plugin</artifactId>
         <version>2.0.5</version>
         <executions>
           <execution>
             <id>process</id>
             <goals>
               <goal>process</goal>
             </goals>
             <phase>generate-sources</phase>
           </execution>
         </executions>
         <dependencies>
           <dependency>
             <groupId>com.google.web.bindery</groupId>
             <artifactId>requestfactory-apt</artifactId>
             <version>${gwt.version}</version>
           </dependency>
         </dependencies>
       </plugin>
     </plugins>
     <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>[2.0.5,)</versionRange>
                     <goals>
                       <goal>process</goal>
                     </goals>
                   </pluginExecutionFilter>
                   <action>
                     <execute />
                   </action>
                 </pluginExecution>
               </pluginExecutions>
             </lifecycleMappingMetadata>
           </configuration>
         </plugin>
       </plugins>
     </pluginManagement>
     </build>
</project>
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