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  1. Jenkins
  2. JENKINS-19214

JGit+SSH fails with NullPointerException

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: Major Major
    • git-client-plugin
    • None
    • Windows 8 64bit
      Jenkins 1.509.2
      Git plugin 1.4.0
      Git client plugin 1.1.2

      1. Enable JGit
        • Add "JGit" to "Manage Jenkins">"Configure System">"Git"
      2. Configure a project with Git+SSH using JGit
        • Check "Git" in "Source Code Management"
        • Put "ssh://..." in "Repository URL"
        • Click "Advanced" just above "Repository Browser" (Not the one just below "Repository URL")
        • Select "jgit" for "Git executable"
      3. Run "Build Now"
      4. Build fails with following output: 
        Using strategy: Default
Cloning the remote Git repository
[WARNING] JGit doesn't support reference repository. This flag is ignored.
FATAL: null
java.lang.NullPointerException
	at org.jenkinsci.plugins.gitclient.trilead.TrileadSessionFactory.getSession(TrileadSessionFactory.java:31)
	at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:121)
	at org.eclipse.jgit.transport.TransportGitSsh$SshFetchConnection.<init>(TransportGitSsh.java:248)
	at org.eclipse.jgit.transport.TransportGitSsh.openFetch(TransportGitSsh.java:147)
	at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:136)
	at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:122)
	at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1105)
	at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:128)
	at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:178)
	at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:125)
	at org.jenkinsci.plugins.gitclient.JGitAPIImpl$3.execute(JGitAPIImpl.java:643)
	at org.jenkinsci.plugins.gitclient.AbstractGitAPIImpl.clone(AbstractGitAPIImpl.java:57)
	at org.jenkinsci.plugins.gitclient.JGitAPIImpl.clone(JGitAPIImpl.java:98)
	at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1006)
	at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:942)
	at hudson.FilePath.act(FilePath.java:904)
	at hudson.FilePath.act(FilePath.java:877)
	at hudson.plugins.git.GitSCM.determineRevisionToBuild(GitSCM.java:942)
	at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1108)
	at hudson.model.AbstractProject.checkout(AbstractProject.java:1367)
	at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:674)
	at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:88)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:579)
	at hudson.model.Run.execute(Run.java:1575)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:237)

          [JENKINS-19214] JGit+SSH fails with NullPointerException

          ikedam added a comment -

          This is caused by JGitAPIImpl#provider is null for no one calls JGitAPIImpl#setCredentialsProvider nor JGitAPIImpl#setCredentials.
          Credentials can be registered in "Manage Jenkins">"Configure System">"Manage Credentials", but there seems no way to specify a credential to use.

          I verified that specifying proper Credential (e.g. fetch a one by CredentialsProvider#lookupCredentials) resolves the problem.

          The problem is:

          • The status of Git Client supporting JGit+SSH: JGit in Git Client is in development, so it may not yet be supported.
          • From when this problem occurs: JENKINS-18957 seems say that this does not happen in a proper version.
          • JGitAPIImpl#provider is cast to CredentialsProviderImpl in TrileadSessionFactory#getSession. This stands for I cannot avoid the problem by creating a subclass of CredentialsProvider and register it as a default for JGitAPIImpl#provider.

          ikedam added a comment - This is caused by JGitAPIImpl#provider is null for no one calls JGitAPIImpl#setCredentialsProvider nor JGitAPIImpl#setCredentials . Credentials can be registered in "Manage Jenkins">"Configure System">"Manage Credentials", but there seems no way to specify a credential to use. I verified that specifying proper Credential (e.g. fetch a one by CredentialsProvider#lookupCredentials ) resolves the problem. The problem is: The status of Git Client supporting JGit+SSH: JGit in Git Client is in development, so it may not yet be supported. From when this problem occurs: JENKINS-18957 seems say that this does not happen in a proper version. JGitAPIImpl#provider is cast to CredentialsProviderImpl in TrileadSessionFactory#getSession . This stands for I cannot avoid the problem by creating a subclass of CredentialsProvider and register it as a default for JGitAPIImpl#provider .

          ikedam added a comment -

          I really want to use JGit, for git.exe in a Windows node running multiple at the same time often hangs up...

          ikedam added a comment - I really want to use JGit, for git.exe in a Windows node running multiple at the same time often hangs up...

          Tomas Hellberg added a comment -

          @ikedam, we have the same problem for Windows slaves. Do you have any idea what is causing the hangs? We currently have to use a custom wrapper script with timeouts and retries to handle this, but it is very slow. I would also very much like a working JGit git client implementation.

          Tomas Hellberg added a comment - @ikedam, we have the same problem for Windows slaves. Do you have any idea what is causing the hangs? We currently have to use a custom wrapper script with timeouts and retries to handle this, but it is very slow. I would also very much like a working JGit git client implementation.

          ikedam added a comment -

          @tomhe You are talking about git.exe in Windows?
          I'm not sure why it hangs...I gave up and I'm trying JGit now.

          Let's go to JENKINS-14046.
          I'll report my case there.
          And please let me know about your script if you wouldn't mind.

          ikedam added a comment - @tomhe You are talking about git.exe in Windows? I'm not sure why it hangs...I gave up and I'm trying JGit now. Let's go to JENKINS-14046 . I'll report my case there. And please let me know about your script if you wouldn't mind.

          Nicolas De Loof added a comment -

          support for credentials in git-client plugin has been designed with git-plugin 2.0 ("refactoring" branch) in mind, that let user define connection credentials using a specific extension.
          There is no plan to provide this feature on 1.x

          Nicolas De Loof added a comment - support for credentials in git-client plugin has been designed with git-plugin 2.0 ("refactoring" branch) in mind, that let user define connection credentials using a specific extension. There is no plan to provide this feature on 1.x

            ndeloof Nicolas De Loof
            ikedam ikedam
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              Created:
              Updated:
              Resolved: