Fix JENKINS-16841

src/main/java/org/jvnet/hudson/plugins/triggers/startup/HudsonComputerListener.java

@@ -54,7 +54,7 @@ private void processAndScheduleIfNeeded(TopLevelItem item, Computer c, TaskListe
         HudsonStartupService startupService = new HudsonStartupService();
         if (startupService.has2Schedule(startupTrigger, node)) {
             listener.getLogger().print("[StartupTrigger] - Scheduling " + project.getName());
-            project.scheduleBuild(0, new HudsonStartupCause());
+            project.scheduleBuild(startupTrigger.getQuietPeriod(), new HudsonStartupCause());
         }
     }
 

src/main/java/org/jvnet/hudson/plugins/triggers/startup/HudsonStartupTrigger.java

@@ -22,18 +22,31 @@ public class HudsonStartupTrigger extends Trigger<BuildableItem> {
 
     private String label;
 
+    private int quietPeriod;
+
     @DataBoundConstructor
-    public HudsonStartupTrigger(String label) throws ANTLRException {
+    public HudsonStartupTrigger(String label, String quietPeriod) throws ANTLRException {
         super();
         this.label = Util.fixEmpty(label);
+        String givenQuietPeriod = Util.fixEmpty(quietPeriod);
+        if (givenQuietPeriod == null) {
+            this.quietPeriod = 0;
+        } else {
+            this.quietPeriod = Integer.parseInt(quietPeriod);
+        }
     }
 
     public String getLabel() {
         return label;
     }
 
+    public int getQuietPeriod() {
+        return quietPeriod;
+    }
+
     @Override
     public void start(BuildableItem project, boolean newInstance) {
+        //DO NOTHING HERE. RELIES ON EXTERNAL LISTENER
     }
 
     @Extension

src/main/resources/org/jvnet/hudson/plugins/triggers/startup/HudsonStartupTrigger/config.jelly

@@ -1,7 +1,11 @@
 <j:jelly xmlns:j="jelly:core" xmlns:f="/lib/form">
 
-    <f:entry field="label" title="${%Node Label}">
+    <f:entry field="label" title="${%Restricted node Label}">
         <f:textbox name="label" value="${instance.label}"/>
     </f:entry>
 
+    <f:entry field="quietPeriod" title="${%Quiet period}">
+        <f:textbox name="quietPeriod" value="${instance.quietPeriod}"/>
+    </f:entry>
+
 </j:jelly>

src/main/resources/org/jvnet/hudson/plugins/triggers/startup/HudsonStartupTrigger/help-label.html

@@ -2,7 +2,7 @@
     <p>
         By default, the build is triggered when Jenkins instance starts.<br/>
         You can specify a specific a node name or a node label to trigger a build when nodes (whose names or labels
-        corresponding to the specified value) start. <br/>.
+        corresponding to the specified value) start. <br/>
         You can also specify the 'master' value to refer explicitly to Jenkins master.
     </p>
 </div>

src/main/resources/org/jvnet/hudson/plugins/triggers/startup/HudsonStartupTrigger/help-quietPeriod.html

@@ -0,0 +1,7 @@
+<div>
+    <p>
+        Give the quiet period before scheduling the job.<br/>
+        The time unit is in seconds.<br/>
+        '0' is the default value, the job is scheduling without any delay at startup.
+    </p>
+</div>