[archiva]probleme de recup d'artifacts

J'ai un probleme avec MAESTRO et archiva :
Lors d'un build de mon projet par Continuum, il devrais me chercher des dependances absentes sur repo1.maven.org; or il n'en n'est rien .
Voici ma config de maestro-archiva
- j'ai deux managed repository sur mon serveur
- j'ai declarer un proxied repository vers repo1.maven.org avec la config suivante ( use HTTP proxy=true , le reste a false - mon proxy est declare dans la conf general maven )
Par contre lorsque je regarde mon settings.xml utilisé par maven seul le repository (http://mon.serveur:8080/archiva/repository) est present.

Mon erreur est la suivante

Code:

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[DEBUG] xml-maven-plugin: using locally installed snapshot
[DEBUG] Artifact not found - using stub model: Unable to determine the latest version
 
  org.codehaus.mojo:xml-maven-plugin:pom:LATEST
 
 
[DEBUG] Using defaults for missing POM org.codehaus.mojo:xml-maven-plugin:pom:LATEST
[DEBUG] xml-maven-plugin: using locally installed snapshot
[DEBUG] Artifact not found - using stub model: Unable to determine the release version
 
  org.codehaus.mojo:xml-maven-plugin:pom:RELEASE
 
 
[DEBUG] Using defaults for missing POM org.codehaus.mojo:xml-maven-plugin:pom:RELEASE
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin 'org.codehaus.mojo:xml-maven-plugin' does not exist or no valid version could be found
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: The plugin 'org.codehaus.mojo:xml-maven-plugin' does not exist or no valid version could be found
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1281)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(DefaultLifecycleExecutor.java:1216)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:982)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:453)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:324)
	at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
	at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
	at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
	at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.version.PluginVersionNotFoundException: The plugin 'org.codehaus.mojo:xml-maven-plugin' does not exist or no valid version could be found
	at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:225)
	at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:87)
	at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:158)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1252)
	... 17 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3 seconds
[INFO] Finished at: Wed Apr 18 19:08:30 CEST 2007
[INFO] Final Memory: 2M/6M
[INFO] ------------------------------------------------------------------------
 
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