when trying to use this plug-in v 2.5.2 for cloning the source code, getting below exception for submodules.
FATAL: not implemented yet java.lang.UnsupportedOperationException: not implemented yet at org.jenkinsci.plugins.gitclient.JGitAPIImpl.setupSubmoduleUrls(JGitAPIImpl.java:2125) 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:622) at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:326) at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:301) at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:260) at hudson.remoting.UserRequest.perform(UserRequest.java:121) at hudson.remoting.UserRequest.perform(UserRequest.java:49) at hudson.remoting.Request$2.run(Request.java:324) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701)
The JGit implementation (which seems to be what you're trying to use) in the git plugin does not support submodules. You'll need to use the command line git version for submodule support.