From 1356e1616848043c79acf8864e00d7787d57e6a3 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Fri, 2 Jun 2017 16:45:17 +0800
Subject: [PATCH] bug fixed for createScheduler not cancel after closed. for
 issue #1758

---
 src/main/java/com/alibaba/druid/pool/DruidDataSource.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index fc770ac2d7..256f6f7198 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -139,10 +139,10 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
     private DruidConnectionHolder[]          keepAliveConnections;
 
     // threads
-    private ScheduledFuture<?>               destroySchedulerFuture;
+    private volatile ScheduledFuture<?>      destroySchedulerFuture;
     private DestroyTask                      destroyTask;
 
-    private Future<?>                        createSchedulerFuture;
+    private volatile Future<?>               createSchedulerFuture;
 
     private CreateConnectionThread           createConnectionThread;
     private DestroyConnectionThread          destroyConnectionThread;