diff --git a/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java b/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
index 1cd47aa..c9d4513 100644
--- a/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
+++ b/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
@@ -159,7 +159,7 @@
                 .map(adminService::register)
                 .ifPresent(success -> {
                    if (!success) {
-                       log.error("Failed to register Bandwidth for {}", portPath.id());
+                       log.warn("Failed to register Bandwidth for {}", portPath.id());
                    }
                 });
 
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
index bbf1436..16fca36 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
@@ -269,6 +269,10 @@
         Dpid dpid = Dpid.dpid(flowRule.deviceId().uri());
         OpenFlowSwitch sw = controller.getSwitch(dpid);
 
+        if (sw == null) {
+            return;
+        }
+
         FlowRuleExtPayLoad flowRuleExtPayLoad = flowRule.payLoad();
         if (hasPayload(flowRuleExtPayLoad)) {
             OFMessage msg = new ThirdPartyMessage(flowRuleExtPayLoad.payLoad());
@@ -298,6 +302,10 @@
         Dpid dpid = Dpid.dpid(flowRule.deviceId().uri());
         OpenFlowSwitch sw = controller.getSwitch(dpid);
 
+        if (sw == null) {
+            return;
+        }
+
         FlowRuleExtPayLoad flowRuleExtPayLoad = flowRule.payLoad();
         if (hasPayload(flowRuleExtPayLoad)) {
             OFMessage msg = new ThirdPartyMessage(flowRuleExtPayLoad.payLoad());
diff --git a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
index 1835cf6..a3822f3 100644
--- a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
+++ b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
@@ -211,7 +211,7 @@
             }
         }
 
-        if (groupStatsReply != null && groupDescStatsReply != null) {
+        if (providerService != null && groupStatsReply != null) {
             Collection<Group> groups = buildGroupMetrics(deviceId,
                     groupStatsReply, groupDescStatsReply);
             providerService.pushGroupMetrics(deviceId, groups);