Problème MAVEN ArtifactResolutionException

Bonjour,

suite à un clean de mon projet un moment maven m'a sortie

org.apache.maven.artifact.resolver.ArtifactResolutionException:

Unable to get dependency information: Unable to read the metadata file for artifact 'org.hibernate:hibernate:jar': Error getting POM for 'org.hibernate:hibernate' from the repository: Error transferring file
org.hibernate:hibernate:pom:3.0.5

Je n'ai aucune idée sur le sujet, car MAVEN est vraiment obscur pour moi, alors es-que je pourrais demander plus d'éclairage sur le sujet svp ? Car avec ce problème je ne peu même plus clean le projet

Merci

Bon sa mache mieu mais j'ai toujours une erreur au bout d'un moment dans mon clean j'ai une nouvelle exception:

[INFO] artifact org.apache.maven.plugins:maven-antrun-plugin: checking for updates from central
attempting to create parent directories for destination: maven-antrun-plugin-1.2.pom.tmp
Downloading [central] -> http://repo1.maven.org/maven2/org/ap...plugin-1.2.pom
..
java.lang.NullPointerException
at org.apache.maven.project.injection.DefaultProfileInjector.injectPlugins(DefaultProfileInjector.java:147)
at org.apache.maven.project.injection.DefaultProfileInjector.injectBuild(DefaultProfileInjector.java:134)
at org.apache.maven.project.injection.DefaultProfileInjector.inject(DefaultProfileInjector.java:80)
at org.apache.maven.project.DefaultMavenProjectBuilder.injectActiveProfiles(DefaultMavenProjectBuilder.java:1035)
at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(DefaultMavenProjectBuilder.java:836)
at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:593)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:353)
at org.apache.maven.project.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:102)
at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolveMetaVersion(DefaultPluginVersionManager.java:669)
at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:183)
at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:87)
at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:160)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1218)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(DefaultLifecycleExecutor.java:1182)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:950)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:450)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:303)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:270)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:139)
at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:472)
at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:413)
at org.maven.ide.eclipse.Maven2Executor.main(Maven2Executor.java:68)