Failure to transfer org.codehaus.plexus:plexus-utils:pom:1.5.6 from http://maven.aliyun.com/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced. Original error: Could not transfer artifact org.codehaus.plexus:plexus-utils:pom:1.5.6 from/to alimaven (http://maven.aliyun.com/nexus/content/groups/public/): maven.aliyun.com
解决方案：
更换setting.xml的中央仓库连不上了， http://repo.maven.apache.org/maven2