From ea1d4ad27dd96fca7b93f31696b3f7d60b1c1f71 Mon Sep 17 00:00:00 2001
From: Jesse Glick <jglick@cloudbees.com>
Date: Mon, 29 Oct 2018 16:08:51 -0400
Subject: [PATCH] Shut down watchService when Jenkins shuts down.

---
 .../jenkinsci/plugins/durabletask/FileMonitoringTask.java  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/org/jenkinsci/plugins/durabletask/FileMonitoringTask.java b/src/main/java/org/jenkinsci/plugins/durabletask/FileMonitoringTask.java
index abd518e4..dd88a3ef 100644
--- a/src/main/java/org/jenkinsci/plugins/durabletask/FileMonitoringTask.java
+++ b/src/main/java/org/jenkinsci/plugins/durabletask/FileMonitoringTask.java
@@ -29,6 +29,7 @@
 import hudson.FilePath;
 import hudson.Launcher;
 import hudson.Util;
+import hudson.init.Terminator;
 import hudson.model.TaskListener;
 import hudson.remoting.Channel;
 import hudson.remoting.DaemonThreadFactory;
@@ -421,6 +422,12 @@ private synchronized static ScheduledExecutorService watchService() {
         }
         return watchService;
     }
+    @Terminator public static synchronized void shutDownWatchService() {
+        if (watchService != null) {
+            watchService.shutdownNow();
+            watchService = null;
+        }
+    }
 
     private static class StartWatching extends MasterToSlaveFileCallable<Void> {