problem info: Failure to transfer org.codehaus.plexus:plexus:pom:3.0.1 from http://repo.maven.apache.org/maven2 was cached in the local repository,
resolution will not be reattempted until the update interval of central has elapsed or updates are forced.

Original error: Could not transfer artifact org.codehaus.plexus:plexus:pom:3.0.1 from/to central (http://repo.maven.apache.org/maven2):

connection timed out to http://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/3.0.1/plexus-3.0.1.pom

除了執行mvn clean  mvn build之外，還要執行mvn install，之後此problem消失