My multi-configuration job which uses JGit and a configured ssh credential from a DSA key file (.ssh/id_dsa) is able to successfully clone from my Debian Wheezy Linux server.

The same credential fails to clone and reports a null pointer exception if I switch from the JGit implementation to the command line implementation.

The stack trace is:

Started by user anonymous
Building remotely on alan-pc in workspace C:\J\workspace\git-jgit-ssh-multi
Fetching changes from the remote Git repository
Fetching upstream changes from ssh://wheezy64b/var/cache/git/mwaite/bin.git
FATAL: null
java.lang.NullPointerException
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:894)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.fetch(CliGitAPIImpl.java:175)
at hudson.plugins.git.GitAPI.fetch(GitAPI.java:229)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:299)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:280)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:239)
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$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:63)
at java.lang.Thread.run(Unknown Source)

The multi-configuration job uses an ssh protocol URL like:

ssh://wheezy64b/var/cache/git/mwaite/bin.git

That URL works well for the JGit implementation, but not for command line git.