Maven tries to download dependency despite it existing in local repository

I have an installed dependency in my local repository. The remote repository where the dependency came from is now down for some reason. When I try to compile the project Maven says that it can't resolve d开发者_运维技巧ependency. But why???

When you have these error, simply clean the _remote.repositories that indicate maven where the dependency comes from. You will find this file for each artifact inside your M2_REPO.

Maven will compare the local POM's timestamp (stored in a repository's maven-metadata file) to the remote. When maven does this depends on the updatePolicy that can be defined in your settings xml.

Either set this to never (discouraged) or skip this check (only when a remote repository appears to be down) by using the -o option (offline); then maven will not check remote repositories.