every time I build our project, it always shows some warnings like this

```
[WARNING] Could not transfer metadata {one of our own snapshot lib}/maven-metadata.xml from/to repository.jboss.org (http://repository.jboss.org/nexus/content/groups/public/): Connect to repository.jboss.org:443 [repository.jboss.org/209.132.182.97] failed: Connection timed out (Connection timed out)

[INFO] Downloading: https://maven.java.net/content/repositories/xxx/1.0.0-SNAPSHOT/maven-metadata.xml
[INFO] Downloading: https://repository.apache.org/content/repositories/xxx/1.0.0-SNAPSHOT/maven-metadata.xml
[INFO] Downloading: http://snapshots.repository.codehaus.org/xxx/1.0.0-SNAPSHOT/maven-metadata.xml

```

we usually can build successfully at last, but some time it will block the build progress for one hour or more.

The interesting thing is that this lib is our own lib in our own nexus server, but maven always tries to download its metadata from other third party repository.

What should I do?