Detecting the Current Branch Failed: Fatal: HEAD Is Not a Symbolic Ref

This issue occurs when I tried with Jenkins build using Maven Release Plugin. I was trying to build my production release artifacts. I was building my "master" branch and its for final release. I have used Git as repository. I faced this issue when clicked on "maven release build" link on left side corner of my Maven project (Jenkins job) .

As we know build issue is common for developers those are actively participating with Build and Release. This issue over Jenkins is common , but I never found any direct or easy solution for this. I spend couple of hour to resolve and google almost all relevant sites and article.But, not able to work out. Finally did it by some HIT and TRY ,then it works for me.   

Issue log details :-

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 23.884s

[INFO] Finished at: Wed Dec 17 18:05:43 EST 2014

[INFO] Final Memory: 15M/301M

[INFO] ------------------------------------------------------------------------

Waiting for Jenkins to finish collecting data

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.0:prepare (default-cli) on project hello_world_app: An error is occurred in the checkin process: Exception while executing SCM command. Detecting the current branch failed: fatal: ref HEAD is not a symbolic ref -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

[JENKINS] Archiving /opt/jenkins_dev/workspace/SDP_BIZ_HELLO_WORLD_APP/pom.xml to in.com.company.xcop.sdp.bizservice.test.dao/hello_world_app/0.0.8-SNAPSHOT/ hello_world_app -0.0.8-SNAPSHOT.pom

channel stopped

Started calculate disk usage of build

Finished Calculation of disk usage of build in 0 seconds

Started calculate disk usage of workspace

Finished Calculation of disk usage of workspace in 0 seconds

Solution :-

 In Jenkins job , open the configuration and go to Git configuration => Advance Options => << add your local branch name >>. In my case I have added "master" .

If you are using some other version of jerkins then , you may find the similar settings with other way. In the same way Git configuration => Advance Options => Additional Behaviors => Check out to specific local branch => << Add your local branch name >>.   

Attached the screenshot below with highlight. 

How to Edit or Fix the Last Git Commit Message

How can I edit / fix the last git commits message?

Amending any message to your git or bit-bucket is quite easy. Normally sometime, a developer need to modify the last committed message in git/bit-bucket. Git command is providing easy commands to achieve this. Follow the below steps with attached screen shot and you can do this.

Just pull your working branch , where  you want to modify the last commit. But, make sure you want to modify your last commit for the working branch.I have bit-bucket in this example post.

Command Syntax:-

git commit --amend -m "Your Amend Message"

Then use the below command to push your changes.

git push -f  origin master

Example , as per the attached screenshot. I have used the command prompt for this example. In the below example , I have updated the new message "Amending new message". Then, push  (used -means --force) the message to git/bit-bucket. Use the below screenshot as reference. 

Bit-Bucket amend

Now, you can see in bit-bucket the last committed message. The last message I have modified , its reflecting.

Bit-Bucket web view

Hope it will help you.