diff --git a/server/src/com/cloud/api/ApiServlet.java b/server/src/com/cloud/api/ApiServlet.java
index 5620015508f..38d2823e96c 100755
--- a/server/src/com/cloud/api/ApiServlet.java
+++ b/server/src/com/cloud/api/ApiServlet.java
@@ -327,8 +327,10 @@ public class ApiServlet extends HttpServlet {
             if (s_logger.isTraceEnabled()) {
                 s_logger.trace("exception writing response: " + ioex);
             }
-        } catch (Exception ex) {
-            s_logger.error("unknown exception writing api response", ex);
+        } catch (Exception ex) {
+            if (!(ex instanceof IllegalStateException)) {
+                s_logger.error("unknown exception writing api response", ex);
+            }
         }
     }
 
diff --git a/server/src/com/cloud/network/NetworkManagerImpl.java b/server/src/com/cloud/network/NetworkManagerImpl.java
index b5481fd0fa9..db08613af48 100755
--- a/server/src/com/cloud/network/NetworkManagerImpl.java
+++ b/server/src/com/cloud/network/NetworkManagerImpl.java
@@ -2273,8 +2273,13 @@ public class NetworkManagerImpl implements NetworkManager, NetworkService, Manag
                 }
 
                 // remove all loadBalancer->VM mappings
-                _loadBalancerVMMapDao.remove(loadBalancerId);
-
+                List<LoadBalancerVMMapVO> lbVmMap = _loadBalancerVMMapDao.listByLoadBalancerId(loadBalancerId);
+                if (lbVmMap != null && !lbVmMap.isEmpty()) {
+                    for (LoadBalancerVMMapVO lb : lbVmMap) {
+                        _loadBalancerVMMapDao.remove(lb.getId());
+                    }
+                }
+                
                 // Save and create the event
                 String description;
                 String type = EventTypes.EVENT_NET_RULE_DELETE;
diff --git a/server/src/com/cloud/storage/StorageManagerImpl.java b/server/src/com/cloud/storage/StorageManagerImpl.java
index 21e9d48f62c..c744550b2b7 100755
--- a/server/src/com/cloud/storage/StorageManagerImpl.java
+++ b/server/src/com/cloud/storage/StorageManagerImpl.java
@@ -1032,7 +1032,11 @@ public class StorageManagerImpl implements StorageManager {
             if (poolId != null && volumePath != null && !volumePath.trim().isEmpty()) {
                 Answer answer = null;
                 StoragePoolVO pool = _storagePoolDao.findById(poolId);
-                final DestroyCommand cmd = new DestroyCommand(pool, vol, vm.getInstanceName());
+                String vmName = null;
+                if (vm != null) {
+                    vmName = vm.getInstanceName();
+                }
+                final DestroyCommand cmd = new DestroyCommand(pool, vol, vmName);
                 boolean removed = false;
                 List<StoragePoolHostVO> poolhosts = _storagePoolHostDao.listByPoolId(poolId);
                 for (StoragePoolHostVO poolhost : poolhosts) {