NullPointerException while trying to setup jenkins with subversion tunnel

[Ankit Tandon]

Hi,

   I am trying to setup jenkins server for my project. I need to access a SVN repo using tunnel + ssh keys. I modified /var/lib/jenkins/.subversion/config and /etc/subversion/config to include following in tunnel section

tunnel = /usr/bin/ssh -p 2223 -l <username>

Running a svn info on the box works fine. 

I then go on to create a jenkins project with an SVN repo svn+tunnel://<svn_host>/<repo>. It fails and ask me to enter credentials. So I enter the username and upload my private keys. Now I receive this exception 

Status Code: 500

Exception: java.lang.NullPointerException
Stacktrace:

javax.servlet.ServletException: java.lang.NullPointerException
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:719)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)
	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)
	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:583)
	at org.kohsuke.stapler.Stapler.service(Stapler.java:214)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)
	at winstone.ServletConfiguration.execute(ServletConfiguration.java:248)
	at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:376)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)
	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)
	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)
	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
	at winstone.RequestDispatcher.forward(RequestDispatcher.java:331)
	at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:227)
	at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.NullPointerException
	at java.util.Hashtable.put(Hashtable.java:411)
	at hudson.scm.SubversionSCM$DescriptorImpl$1.onSuccess(SubversionSCM.java:1930)
	at hudson.scm.UserProvidedCredential$AuthenticationManagerImpl.acknowledgeAuthentication(UserProvidedCredential.java:233)
	at org.tmatesoft.svn.core.auth.BasicAuthenticationManager.acknowledgeAuthentication(BasicAuthenticationManager.java:56)
	at org.tmatesoft.svn.core.internal.io.svn.SVNTunnelConnector.open(SVNTunnelConnector.java:66)
	at org.tmatesoft.svn.core.internal.io.svn.SVNConnection.open(SVNConnection.java:77)
	at org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.openConnection(SVNRepositoryImpl.java:1252)
	at org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.testConnection(SVNRepositoryImpl.java:95)
	at hudson.scm.SubversionSCM$DescriptorImpl.postCredential(SubversionSCM.java:1939)
	at hudson.scm.SubversionSCM$DescriptorImpl.doPostCredential(SubversionSCM.java:1884)
	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:616)
	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288)
	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:151)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:90)
	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)
	... 43 more

I have tried all options. Any help will be deeply appreciated here. 

Thanks,

Ankit