Maven2 问题

[INFO] artifact commons-collections:commons-collections: checking for updates fr
om central
[WARNING] repository metadata for: 'artifact commons-collections:commons-collect
ions' could not be retrieved from repository: central due to an error: Error tra
nsferring file
[INFO] Repository 'central' will be blacklisted
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

No versions are present in the repository for the artifact with a range [1.7,)
commons-digester:commons-digester:jar:null

from the specified remote repositories:
central (http://repo1.maven.org/maven2)

不知道是什么问题导致的？哪位高手帮看看。