diff --git a/libra/api/controllers/health_monitor.py b/libra/api/controllers/health_monitor.py
index 0ba693f6..0cda7585 100644
--- a/libra/api/controllers/health_monitor.py
+++ b/libra/api/controllers/health_monitor.py
@@ -76,11 +76,14 @@ class HealthMonitorController(RestController):
             if monitor.path:
                 monitor_data['path'] = monitor.path
 
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_healthmonitor_get').first()
-            counter.value += 1
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_healthmonitor_get').first()
+                counter.value += 1
 
-            session.commit()
+                session.commit()
+            except:
+                pass
         return monitor_data
 
     @wsme_pecan.wsexpose(LBMonitorResp, body=LBMonitorPut, status_code=202)
@@ -244,10 +247,13 @@ class HealthMonitorController(RestController):
             if ((data["path"] is not None) and (len(data["path"]) > 0)):
                 return_data.path = data["path"]
 
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_healthmonitor_modify').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_healthmonitor_modify').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             submit_job(
                 'UPDATE', device.name, device.id, lb.id
             )
@@ -296,10 +302,13 @@ class HealthMonitorController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_healthmonitor.delete').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_healthmonitor.delete').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             submit_job(
                 'UPDATE', device.name, device.id, self.lbid
             )
diff --git a/libra/api/controllers/limits.py b/libra/api/controllers/limits.py
index f4fa6943..bc1c6f08 100644
--- a/libra/api/controllers/limits.py
+++ b/libra/api/controllers/limits.py
@@ -40,8 +40,11 @@ class LimitsController(RestController):
                 resp['maxLoadBalancers'] = tenant_lblimit
 
             resp = {"limits": {"absolute": {"values": resp}}}
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_limits_get').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_limits_get').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             return resp
diff --git a/libra/api/controllers/load_balancers.py b/libra/api/controllers/load_balancers.py
index b128f03a..8d1917da 100644
--- a/libra/api/controllers/load_balancers.py
+++ b/libra/api/controllers/load_balancers.py
@@ -206,10 +206,13 @@ class LoadBalancersController(RestController):
                 del(load_balancers['timeout'])
                 del(load_balancers['retries'])
 
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_loadbalancers_get').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_loadbalancers_get').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             response.status = 200
             return load_balancers
 
@@ -610,10 +613,13 @@ class LoadBalancersController(RestController):
             return_data.options = LBOptions(timeout=timeout_ms,
                                             retries=retries)
 
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_loadbalancers_create').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_loadbalancers_create').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             # trigger gearman client to create new lb
             submit_job(
                 'UPDATE', device.name, device.id, lb.id
@@ -693,14 +699,19 @@ class LoadBalancersController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_loadbalancers_modify').first()
-            counter.value += 1
             session.commit()
             submit_job(
                 'UPDATE', device.name, device.id, lb.id
             )
-            return ''
+        with db_session() as session:
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_loadbalancers_modify').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
+        return ''
 
     @wsme_pecan.wsexpose(None, status_code=202)
     def delete(self):
@@ -743,10 +754,6 @@ class LoadBalancersController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == load_balancer_id).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_loadbalancers_delete').first()
-            counter.value += 1
-
             if device is None:
                 # This can happen if a device was manually deleted from the DB
                 lb.status = 'DELETED'
@@ -764,7 +771,16 @@ class LoadBalancersController(RestController):
                     'DELETE', device.name, device.id, lb.id
                 )
 
-            return None
+        with db_session() as session:
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_loadbalancers_delete').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
+
+        return None
 
     def usage(self, load_balancer_id):
         """List current and historical usage.
diff --git a/libra/api/controllers/logs.py b/libra/api/controllers/logs.py
index b4349f26..8bf11c5e 100644
--- a/libra/api/controllers/logs.py
+++ b/libra/api/controllers/logs.py
@@ -59,9 +59,6 @@ class LogsController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_log_archive').first()
-            counter.value += 1
             session.commit()
             data = {
                 'deviceid': device.id
@@ -90,4 +87,13 @@ class LogsController(RestController):
             submit_job(
                 'ARCHIVE', device.name, data, self.lbid
             )
-            return
+        with db_session() as session:
+            try:
+                load_balancer = session.query(LoadBalancer).\
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_log_archive').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
+        return
diff --git a/libra/api/controllers/nodes.py b/libra/api/controllers/nodes.py
index 81047390..9ca1bea1 100644
--- a/libra/api/controllers/nodes.py
+++ b/libra/api/controllers/nodes.py
@@ -100,10 +100,13 @@ class NodesController(RestController):
                 del node_response['enabled']
                 if node_response['weight'] == 1:
                     del node_response['weight']
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_node_get').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_node_get').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             response.status = 200
             return node_response
 
@@ -258,10 +261,13 @@ class NodesController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_node_create').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_node_create').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             submit_job(
                 'UPDATE', device.name, device.id, self.lbid
             )
@@ -340,10 +346,13 @@ class NodesController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_node_modify').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_node_modify').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             submit_job(
                 'UPDATE', device.name, device.id, lb.id
             )
@@ -419,10 +428,13 @@ class NodesController(RestController):
             ).join(LoadBalancer.devices).\
                 filter(LoadBalancer.id == self.lbid).\
                 first()
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_node_delete').first()
-            counter.value += 1
-            session.commit()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_node_delete').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             submit_job(
                 'UPDATE', device.name, device.id, self.lbid
             )
diff --git a/libra/api/controllers/virtualips.py b/libra/api/controllers/virtualips.py
index b98e07bc..04b49823 100644
--- a/libra/api/controllers/virtualips.py
+++ b/libra/api/controllers/virtualips.py
@@ -66,8 +66,11 @@ class VipsController(RestController):
                     "ipVersion": "IPV4"
                 }]
             }
-            counter = session.query(Counters).\
-                filter(Counters.name == 'api_vips_get').first()
-            counter.value += 1
-            session.rollback()
+            try:
+                counter = session.query(Counters).\
+                    filter(Counters.name == 'api_vips_get').first()
+                counter.value += 1
+                session.commit()
+            except:
+                pass
             return resp