From ea5b6246d24c6092cda17c28610f76b17b0be25c Mon Sep 17 00:00:00 2001
From: Dave Brosius <dbrosius@mebigfatguy.com>
Date: Mon, 26 May 2014 16:39:10 -0400
Subject: [PATCH] don't NPE shutting down, due to gossip failure

---
 src/java/org/apache/cassandra/gms/Gossiper.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/cassandra/gms/Gossiper.java b/src/java/org/apache/cassandra/gms/Gossiper.java
index f014ac0896..c04a87d416 100644
--- a/src/java/org/apache/cassandra/gms/Gossiper.java
+++ b/src/java/org/apache/cassandra/gms/Gossiper.java
@@ -1267,7 +1267,8 @@ public class Gossiper implements IFailureDetectionEventListener, GossiperMBean
 
     public void stop()
     {
-        scheduledGossipTask.cancel(false);
+    	if (scheduledGossipTask != null)
+    		scheduledGossipTask.cancel(false);
         logger.info("Announcing shutdown");
         Uninterruptibles.sleepUninterruptibly(intervalInMillis * 2, TimeUnit.MILLISECONDS);
         MessageOut message = new MessageOut(MessagingService.Verb.GOSSIP_SHUTDOWN);