diff --git a/apps/roadm/src/main/java/org/onosproject/roadm/RoadmManager.java b/apps/roadm/src/main/java/org/onosproject/roadm/RoadmManager.java
index a0cace966b..7f44e23d56 100644
--- a/apps/roadm/src/main/java/org/onosproject/roadm/RoadmManager.java
+++ b/apps/roadm/src/main/java/org/onosproject/roadm/RoadmManager.java
@@ -149,7 +149,8 @@ public class RoadmManager implements RoadmService {
                 }
             }
         }
-        log.warn("Unable to get port status, device: {}, port: {}", deviceId, portNumber);
+        // Do not need warning here for port polling.
+        log.debug("Unable to get port status, device: {}, port: {}", deviceId, portNumber);
         return null;
     }
 
@@ -441,7 +442,8 @@ public class RoadmManager implements RoadmService {
         if (device != null && device.is(PowerConfig.class)) {
             return device.as(PowerConfig.class);
         }
-        log.warn("Unable to load PowerConfig for {}", deviceId);
+        // Do not need warning here for port polling.
+        log.debug("Unable to load PowerConfig for {}", deviceId);
         return null;
     }
 
@@ -450,7 +452,8 @@ public class RoadmManager implements RoadmService {
         if (device != null && device.is(LambdaQuery.class)) {
             return device.as(LambdaQuery.class);
         }
-        log.warn("Unable to load LambdaQuery for {}", deviceId);
+        // Do not need warning here for port polling.
+        log.debug("Unable to load LambdaQuery for {}", deviceId);
         return null;
     }
 
@@ -459,7 +462,8 @@ public class RoadmManager implements RoadmService {
         if (device != null && device.is(ProtectionConfigBehaviour.class)) {
             return device.as(ProtectionConfigBehaviour.class);
         }
-        log.warn("Unable to load ProtectionConfigBehaviour for {}", deviceId);
+        // Do not need warning here for port polling.
+        log.debug("Unable to load ProtectionConfigBehaviour for {}", deviceId);
         return null;
     }
 
diff --git a/drivers/optical/src/main/java/org/onosproject/driver/optical/power/OplinkPowerConfigUtil.java b/drivers/optical/src/main/java/org/onosproject/driver/optical/power/OplinkPowerConfigUtil.java
index 45e2c5816f..1b2a0d155f 100644
--- a/drivers/optical/src/main/java/org/onosproject/driver/optical/power/OplinkPowerConfigUtil.java
+++ b/drivers/optical/src/main/java/org/onosproject/driver/optical/power/OplinkPowerConfigUtil.java
@@ -400,7 +400,8 @@ public class OplinkPowerConfigUtil {
         }
         String power = port.annotations().value(annotation);
         if (power == null) {
-            log.warn("Cannot get {} from port {}.", annotation, portNum);
+            // Do not need warning here for port polling.
+            log.debug("Cannot get {} from port {}.", annotation, portNum);
             return null;
         }
         return Long.valueOf(power);