diff --git a/src/main/java/neatlogic/module/cmdb/dao/mapper/resourcecenter/ResourceMapper.xml b/src/main/java/neatlogic/module/cmdb/dao/mapper/resourcecenter/ResourceMapper.xml
index f53dd4c2d6271744c1b69f2a0bb868b04f97c346..81ca068620fc1c6dc5714a21decfabf17925ae16 100644
--- a/src/main/java/neatlogic/module/cmdb/dao/mapper/resourcecenter/ResourceMapper.xml
+++ b/src/main/java/neatlogic/module/cmdb/dao/mapper/resourcecenter/ResourceMapper.xml
@@ -1119,6 +1119,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.-->
         <if test="port == null">
             and a.`port` is null
         </if>
+        LIMIT 1
     </select>
 
     <select id="getAppSystemById" parameterType="java.lang.Long" resultMap="resourceCenterMap">