Hi,

Just passed to git, I've moved some of my projects from SVN to GIT. In 
Jenkins, builds are working but when I try to release, I get the following 
stack trace (see at the end of this mail).

I configured a very simple project here : 
https://github.com/bouquetf/test-git-release-plugin
I reprodued the issue on dev@cloud (cloudbees). For the configuration, it's 
quiet simple : maven-release-plugin, basic configuration for the rest of 
the project.

I tryed several possibilities : 
- merge origin and master after pull : does not work
- create a branch at each pull : works for only one build. After, sir 
Jenkins says the branch already exists.

Of course, searching the internet did not help much.

Hope you'll have an idea to help me.

Here's the stacktrace : 

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute 
goal org.apache.maven.plugins:maven-release-plugin:2.4.1:prepare 
(default-cli) on project test-release-plugin: An error is occurred in the 
checkin process: Exception while executing SCM command.

        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
        at 
org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
        at 
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at 
org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
        at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:158)
        at hudson.maven.Maven3Builder.call(Maven3Builder.java:100)
        at hudson.maven.Maven3Builder.call(Maven3Builder.java:66)
        at hudson.remoting.UserRequest.perform(UserRequest.java:118)
        at hudson.remoting.UserRequest.perform(UserRequest.java:48)
        at hudson.remoting.Request$2.run(Request.java:326)
        at 
hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)
Caused by: org.apache.maven.plugin.MojoExecutionException: An error is occurred 
in the checkin process: Exception while executing SCM command.
        at 
org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:281)
        at 
org.apache.maven.plugins.release.PrepareReleaseMojo.execute(PrepareReleaseMojo.java:232)
        at 
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        ... 27 more
Caused by: org.apache.maven.shared.release.ReleaseExecutionException: An error 
is occurred in the checkin process: Exception while executing SCM command.
        at 
org.apache.maven.shared.release.phase.AbstractScmCommitPhase.checkin(AbstractScmCommitPhase.java:160)
        at 
org.apache.maven.shared.release.phase.AbstractScmCommitPhase.performCheckins(AbstractScmCommitPhase.java:145)
        at 
org.apache.maven.shared.release.phase.ScmCommitPreparationPhase.runLogic(ScmCommitPreparationPhase.java:76)
        at 
org.apache.maven.shared.release.phase.AbstractScmCommitPhase.execute(AbstractScmCommitPhase.java:78)
        at 
org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:234)
        at 
org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:169)
        at 
org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:146)
        at 
org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:107)
        at 
org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:277)
        ... 30 more
Caused by: org.apache.maven.scm.ScmException: Exception while executing SCM 
command.
        at 
org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:63)
        at 
org.apache.maven.scm.provider.git.AbstractGitScmProvider.executeCommand(AbstractGitScmProvider.java:291)
        at 
org.apache.maven.scm.provider.git.AbstractGitScmProvider.checkin(AbstractGitScmProvider.java:217)
        at 
org.apache.maven.scm.provider.AbstractScmProvider.checkIn(AbstractScmProvider.java:410)
        at 
org.apache.maven.shared.release.phase.AbstractScmCommitPhase.checkin(AbstractScmCommitPhase.java:156)
        ... 38 more
Caused by: org.apache.maven.scm.ScmException: Detecting the current branch 
failed: fatal: ref HEAD is not a symbolic ref

        at 
org.apache.maven.scm.provider.git.gitexe.command.branch.GitBranchCommand.getCurrentBranch(GitBranchCommand.java:147)
        at 
org.apache.maven.scm.provider.git.gitexe.command.checkin.GitCheckInCommand.createPushCommandLine(GitCheckInCommand.java:192)
        at 
org.apache.maven.scm.provider.git.gitexe.command.checkin.GitCheckInCommand.executeCheckInCommand(GitCheckInCommand.java:132)
        at 
org.apache.maven.scm.command.checkin.AbstractCheckInCommand.executeCommand(AbstractCheckInCommand.java:54)
        at 
org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:59)
        ... 42 more



Thank you

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