From 38bc20e67fe8324442e802a41e34564607e30535 Mon Sep 17 00:00:00 2001
From: Min Chen <min.chen@citrix.com>
Date: Wed, 12 Mar 2014 15:44:18 -0700
Subject: [PATCH] CLOUDSTACK-6236:Negative ref_cnt of
 template(snapshot/volume)_store_ref results in out-of-range error in Mysql

(cherry picked from commit cd8af6a3e2a180ea4d2cfea8a273dbb0929e0a87)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	engine/schema/src/org/apache/cloudstack/storage/datastore/db/TemplateDataStoreVO.java
---
 .../cloudstack/storage/datastore/db/VolumeDataStoreVO.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/engine/schema/src/org/apache/cloudstack/storage/datastore/db/VolumeDataStoreVO.java b/engine/schema/src/org/apache/cloudstack/storage/datastore/db/VolumeDataStoreVO.java
index 91d4ef71cfa..be6a6ad6f99 100755
--- a/engine/schema/src/org/apache/cloudstack/storage/datastore/db/VolumeDataStoreVO.java
+++ b/engine/schema/src/org/apache/cloudstack/storage/datastore/db/VolumeDataStoreVO.java
@@ -350,7 +350,12 @@ public class VolumeDataStoreVO implements StateObject<ObjectInDataStoreStateMach
     }
 
     public void setRefCnt(Long refCnt) {
-        this.refCnt = refCnt;
+        if (refCnt > 0) {
+            refCnt--;
+        }
+        else {
+            s_logger.warn("We should not try to decrement a zero reference count even though our code has guarded");
+        }
     }
 
     public void incrRefCnt() {