Using

• Hudson 1.101
• SSH to launch a slave agent (Linux master, Windows/Cygwin slave)
• the svn+ssh protocol for a Subversion repository
• credentials with a username and a private keyfile (no passphrase)

The build succeeds on a master node, however, an exception occurs when it is
tied to a slave node:

java.lang.NullPointerException:
at
hudson.scm.SubversionSCM$DescriptorImpl$SshPublicKeyCredential.getKeyFile(SubversionSCM.java:598)
at
hudson.scm.SubversionSCM$DescriptorImpl$SshPublicKeyCredential.createSVNAuthentication(SubversionSCM.java:619)
at
hudson.scm.SubversionSCM$DescriptorImpl$SshPublicKeyCredential.createSVNAuthentication(SubversionSCM.java:568)
at
hudson.scm.SubversionSCM$DescriptorImpl$SVNAuthenticationProviderImpl.requestClientAuthentication(SubversionSCM.java:661)
at
org.tmatesoft.svn.core.internal.wc.DefaultSVNAuthenticationManager.getFirstAuthentication(DefaultSVNAuthenticationManager.java:148)
at
org.tmatesoft.svn.core.internal.io.svn.SVNGanymedConnector.open(SVNGanymedConnector.java:62)
at
org.tmatesoft.svn.core.internal.io.svn.SVNConnection.open(SVNConnection.java:59)
at
org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.openConnection(SVNRepositoryImpl.java:999)
at
org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.getLatestRevision(SVNRepositoryImpl.java:136)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.getRevisionNumber(SVNBasicClient.java:344)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.getLocations(SVNBasicClient.java:458)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:414)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:378)
at
org.tmatesoft.svn.core.wc.SVNUpdateClient.doCheckout(SVNUpdateClient.java:305)
at hudson.scm.SubversionSCM$1.invoke(SubversionSCM.java:304)
at hudson.scm.SubversionSCM$1.invoke(SubversionSCM.java:277)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:904)
at hudson.remoting.UserRequest.perform(UserRequest.java:57)
at hudson.remoting.UserRequest.perform(UserRequest.java:22)
at hudson.remoting.Request$2.run(Request.java:178)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)