maven 의 update policy

maven update policy

always - always check when Maven is started for newer versions of snapshots
never - never check for newer remote versions. Once off manual updates can be performed.
daily (default) - check on the first run of the day (local time)
interval:XXX - check every XXX minutes

update policy 설정

<profiles>    <profile>
      ...
      <repositories>      
          <snapshots>
            <enabled>true</enabled>
            <updatePolicy>always</updatePolicy>
            <checksumPolicy>fail</checksumPolicy>
          </snapshots>
          <url>http://snapshots.maven.codehaus.org/maven2</url>
          <layout>default</layout>
        </repository>
      </repositories>
      ...
    </profile>
  </profiles>

Ref

http://stackoverflow.com/questions/3805329/how-does-the-updatepolicy-in-maven-really-work

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