Jenkins Git plugin detached HEAD

Question

I’m new to git and Jenkins. When I build a common Maven build with Jenkins, it works well, but when I try to perform a release with the Maven release plugin I’m getting the following error

[INFO] Executing: /bin/sh -c cd
/var/lib/jenkins/workspace/test_maven/parent && git symbolic-ref HEAD
[INFO]  Working directory:
/var/lib/jenkins/workspace/test_maven/parent  mojoFailed
org.apache.maven.plugins:maven-release-plugin:2.3.2(default-cli)
projectFailed ch.apkern.achilles:parent:1.0-SNAPSHOT  sessionEnded

Answer 1

Try this, it worked for me

Repository URL: <repo>

Branches to build: master

Checkout/merge to local branch (optional): master

Answer 2

Go to Job Configuration. Scroll down to Git section and click "Advanced..." button under "Repositories". Then set:

Name: origin
Refspec: +refs/heads/branch-0.1:refs/remotes/origin/localbranchname

Then click another "Advanced..." button and set:

Checkout/merge to local branch (optional): localbranchname

You can name local branch as you like, but destination in Refspec must match local branch name in that optional field (in this case "localbranchname"). This will attach HEAD to localbranchname like this:

HEAD -> refs/heads/localbranchname -> 7a698457751bdc043cfda631b81e3812c5361790