diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index e0a5c9ad91..c45965d8eb 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -651,7 +651,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
                     int waitThreadCount = lock.getWaitQueueLength(notEmpty);
 
                     if (poolingCount - waitThreadCount >= 0) {
-                        empty.await(1, TimeUnit.SECONDS); // 防止信号丢失引起的等待
+                        empty.await(3, TimeUnit.SECONDS); // 防止信号丢失引起的等待
                         continue;
                     }
 
diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSourceMBean.java b/src/main/java/com/alibaba/druid/pool/DruidDataSourceMBean.java
index 4e4b9ce000..b623e17207 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSourceMBean.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSourceMBean.java
@@ -22,8 +22,6 @@ public interface DruidDataSourceMBean extends DruidAbstractDataSourceMBean {
 
     boolean isEnable();
 
-    void setEnable(boolean enable);
-
     void shrink();
     
     String toString();