From b1682b1eef100b8e5f3022f29ac4d09dfaf1c9eb Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Fri, 2 Sep 2011 16:32:47 +0000
Subject: [PATCH] git-svn-id: http://code.alibabatech.com/svn/druid/trunk@589
 b9813039-fb51-4c41-a8b9-e21c2acb5095

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

diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index 2b03570a1a..447d2f4646 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -546,6 +546,10 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             if (poolingCount == 0) {
                 lowWater.signal(); // send signal to CreateThread create connection
                 
+                if (estimate <= 0) {
+                    return null;
+                }
+                
                 try {
                     estimate = notEmpty.awaitNanos(estimate); // signal by recycle or creator
                 } catch (InterruptedException ie) {