I have additional info to report. I was able to get the VaultSCM plugin running in a debugger to track down exactly where the NPE occurs.

It occurs at line 357 in method getVaultPath() in file VaultSCM.java. The Computer object is NULL and I'm trying to identify why.

    private String getVaultPath(Launcher launcher, TaskListener listener) throws InterruptedException, IOException {

        final String defaultPath = "C:\\Program Files\\SourceGear\\Vault Client\\vault.exe";
        final String defaultPathX86 = "C:\\Program Files (x86)\\SourceGear\\Vault Client\\vault.exe";

        VaultSCMInstallation installation = getVault();
        String pathToVault;

        if (installation == null) {
            // Check the first default location for vault...
            if (checkVaultPath(defaultPath, launcher, listener)) {
                pathToVault = defaultPath;
            } else if (checkVaultPath(defaultPathX86, launcher, listener)) {
                pathToVault = defaultPathX86;
            } else {
                listener.fatalError("Failed find vault client");
                return null;
            }
        } else {
NPE-->      installation = installation.forNode(Computer.currentComputer().getNode(), listener);
            pathToVault = installation.getVaultLocation();
            if (!checkVaultPath(pathToVault, launcher, listener)) {
                listener.fatalError(pathToVault + " doesn't exist");
                return null;
            }
        }
        return pathToVault;
    }

I've managed to get SCM polling to work by commenting out line 357 (noted in the previous comment with 'NPE--->').

I'm not sure what the intent was of using forNode(). My first thought was that it allows for the case where a job is running on a slave node. After further consideration I don't think that is accurate as my understanding is that only a master node performs SCM polling.

Any comments?

is this issue got resolved?? I am facing the same issue.

Started on Dec 18, 2017 12:12:57 AM Polling SCM changes on master ERROR: Failed to record SCM polling for hudson.model.FreeStyleProject@1762e86[vault-ci-test] java.lang.NullPointerException at org.jvnet.hudson.plugins.VaultSCM.getVaultPath(VaultSCM.java:334) at org.jvnet.hudson.plugins.VaultSCM.determineChangeCount(VaultSCM.java:521) at org.jvnet.hudson.plugins.VaultSCM.compareRemoteRevisionWith(VaultSCM.java:293) at hudson.scm.SCM.poll(SCM.java:408) at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1416) at hudson.model.AbstractProject._poll(AbstractProject.java:1386) at hudson.model.AbstractProject.poll(AbstractProject.java:1297) at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:594) at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:640) at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:119) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 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 java.lang.Thread.run(Unknown Source)

Regards,

Raja