diff --git a/apps/fwd/src/main/java/org/onosproject/fwd/ReactiveForwarding.java b/apps/fwd/src/main/java/org/onosproject/fwd/ReactiveForwarding.java
index dc925e6..a10bfef 100644
--- a/apps/fwd/src/main/java/org/onosproject/fwd/ReactiveForwarding.java
+++ b/apps/fwd/src/main/java/org/onosproject/fwd/ReactiveForwarding.java
@@ -149,7 +149,7 @@
         try {
             String flag = (String) properties.get(propertyName);
             if (flag != null) {
-                enabled = flag.equals("true");
+                enabled = flag.trim().equals("true");
             }
         } catch (ClassCastException e) {
             // No propertyName defined.
diff --git a/core/net/src/main/java/org/onosproject/net/topology/impl/DefaultTopologyProvider.java b/core/net/src/main/java/org/onosproject/net/topology/impl/DefaultTopologyProvider.java
index cb24851..b74f8b1 100644
--- a/core/net/src/main/java/org/onosproject/net/topology/impl/DefaultTopologyProvider.java
+++ b/core/net/src/main/java/org/onosproject/net/topology/impl/DefaultTopologyProvider.java
@@ -158,13 +158,13 @@
         int newMaxEvents, newMaxBatchMs, newMaxIdleMs;
         try {
             String s = (String) properties.get("maxEvents");
-            newMaxEvents = isNullOrEmpty(s) ? maxEvents : Integer.parseInt(s);
+            newMaxEvents = isNullOrEmpty(s) ? maxEvents : Integer.parseInt(s.trim());
 
             s = (String) properties.get("maxBatchMs");
-            newMaxBatchMs = isNullOrEmpty(s) ? maxBatchMs : Integer.parseInt(s);
+            newMaxBatchMs = isNullOrEmpty(s) ? maxBatchMs : Integer.parseInt(s.trim());
 
             s = (String) properties.get("maxIdleMs");
-            newMaxIdleMs = isNullOrEmpty(s) ? maxIdleMs : Integer.parseInt(s);
+            newMaxIdleMs = isNullOrEmpty(s) ? maxIdleMs : Integer.parseInt(s.trim());
 
         } catch (Exception e) {
             newMaxEvents = DEFAULT_MAX_EVENTS;
diff --git a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
index 6656a8f..c12991a 100644
--- a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
+++ b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
@@ -147,9 +147,9 @@
         int newRate;
         try {
             String s = (String) properties.get("flicker");
-            flickSetting = isNullOrEmpty(s) ? flicker : Boolean.valueOf(s);
+            flickSetting = isNullOrEmpty(s) ? flicker : Boolean.valueOf(s.trim());
             s = (String) properties.get("eventRate");
-            newRate = isNullOrEmpty(s) ? eventRate : Integer.valueOf(s);
+            newRate = isNullOrEmpty(s) ? eventRate : Integer.valueOf(s.trim());
         } catch (Exception e) {
             log.warn(e.getMessage());
             flickSetting = flicker;
diff --git a/providers/null/packet/src/main/java/org/onosproject/provider/nil/packet/impl/NullPacketProvider.java b/providers/null/packet/src/main/java/org/onosproject/provider/nil/packet/impl/NullPacketProvider.java
index e70076f..2f63952 100644
--- a/providers/null/packet/src/main/java/org/onosproject/provider/nil/packet/impl/NullPacketProvider.java
+++ b/providers/null/packet/src/main/java/org/onosproject/provider/nil/packet/impl/NullPacketProvider.java
@@ -122,7 +122,7 @@
         int newRate;
         try {
             String s = String.valueOf(properties.get("pktRate"));
-            newRate = isNullOrEmpty(s) ? pktRate : Integer.valueOf(s);
+            newRate = isNullOrEmpty(s) ? pktRate : Integer.valueOf(s.trim());
         } catch (Exception e) {
             log.warn(e.getMessage());
             newRate = pktRate;