Hi Sheng， Using google with the key word "git submodule maven release", I got the below link. Hope it can help you to solve the issue.
 https://stackoverflow.com/questions/6938142/how-to-get-maven-release-to-clone-git-submodules Willem Jiang Blog: http://willemjiang.blogspot.com (English) http://jnn.iteye.com (Chinese) Twitter: willemjiang Weibo: 姜宁willem On Sun, Mar 11, 2018 at 9:20 AM, 吴晟 Sheng Wu <wu.sh...@foxmail.com> wrote: > Hi incubator, > > > I am facing some issues when I do the SkyWalking first release. I am > following this document http://www.apache.org/dev/ > publishing-maven-artifacts.html#dev-env . But an error occurs in step > 4-STAGE THE RELEASE FOR A VOTE. > > > The reason of this is SkyWalking is using `git submodule` feature, so > after `git clone`, need to run `git submodule init` and `git submodule > update`, but in `mvn release:perform`, don't execute this in default. > > > I need some helps and guides about how to run these `submodule` commands. > Who can help us? Or where should I ask? > > > Thanks. > > > ------------------ > Sheng Wu > Apache SkyWalking creator and PPMC member