- user credentials are wrong
- url to server is wrong
- user does not have access to the deployment repository
- user does not have access to the specific repository target
- artifact is already deployed with that version if it is a release (not -SNAPSHOT version)
- the repository is not suitable for deployment of the respective artifact (e.g. release repo for snapshot version, proxy repo or group instead of a hosted repository)
mvn deploy返回400错误的几种可能
原文：http://www.cnblogs.com/kangyun/p/4691521.html
