maven: what does ` -U,--update-snapshots` really do?

Question

In the command line help, I see that maven \"checks\" for updates:

-U,--update-snapshots                  Forces a check for updated
                                     


        

Answer 1

when you will get https://repo.spring.io/milestone was cached in the local repository, resolution will not be reattempted until the update interval of spring-milestones has elapsed or updates are forced

in that case you have to use mvn clean package -U