diff --git a/apps/virtualbng/src/main/java/org/onosproject/virtualbng/VbngConfigurationManager.java b/apps/virtualbng/src/main/java/org/onosproject/virtualbng/VbngConfigurationManager.java
index c09d7ccf0b..adc696652f 100644
--- a/apps/virtualbng/src/main/java/org/onosproject/virtualbng/VbngConfigurationManager.java
+++ b/apps/virtualbng/src/main/java/org/onosproject/virtualbng/VbngConfigurationManager.java
@@ -263,7 +263,7 @@ public class VbngConfigurationManager implements VbngConfigurationService {
 
                 // Judge whether the prefix of this public IP address is used
                 // up, if so, update the IP prefix status.
-                int prefixLen = prefix.getKey().prefixLength();
+                double prefixLen = prefix.getKey().prefixLength();
                 int availableIpNum = (int) Math.pow(2,
                         IpPrefix.MAX_INET_MASK_LENGTH - prefixLen) - 1;
                 int usedIpNum = 0;
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java b/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java
index 99920f9d78..873a0b8a26 100644
--- a/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java
@@ -194,7 +194,7 @@ public class ConfigFileBasedClusterMetadataProvider implements ClusterMetadataPr
             }
 
             try {
-                Thread.sleep((int) Math.pow(2, iterations < 7 ? ++iterations : iterations) * 10);
+                Thread.sleep((int) Math.pow(2, iterations < 7 ? ++iterations : iterations) * 10L);
             } catch (InterruptedException e) {
                 throw Throwables.propagate(e);
             }
diff --git a/drivers/lumentum/src/main/java/org/onosproject/drivers/lumentum/LumentumSnmpDevice.java b/drivers/lumentum/src/main/java/org/onosproject/drivers/lumentum/LumentumSnmpDevice.java
index 47b98e209e..cd6ba1a76a 100644
--- a/drivers/lumentum/src/main/java/org/onosproject/drivers/lumentum/LumentumSnmpDevice.java
+++ b/drivers/lumentum/src/main/java/org/onosproject/drivers/lumentum/LumentumSnmpDevice.java
@@ -85,7 +85,7 @@ public class LumentumSnmpDevice {
         target.setCommunity(new OctetString("public"));
         target.setAddress(targetAddress);
         target.setRetries(3);
-        target.setTimeout(1000 * 3);
+        target.setTimeout(1000L * 3L);
         target.setVersion(SnmpConstants.version2c);
         target.setMaxSizeRequestPDU(MAX_SIZE_RESPONSE_PDU);
     }
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowStatsCollector.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowStatsCollector.java
index f2e7137a7a..0f2ed2727a 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowStatsCollector.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowStatsCollector.java
@@ -65,7 +65,7 @@ class FlowStatsCollector implements SwitchDataCollector {
         this.pollInterval = pollInterval;
         task.cancel();
         task = new InternalTimerTask();
-        timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000);
+        timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000L);
     }
 
     private class InternalTimerTask extends TimerTask {
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/TableStatisticsCollector.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/TableStatisticsCollector.java
index 73dabeb04b..a3644d28db 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/TableStatisticsCollector.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/TableStatisticsCollector.java
@@ -63,7 +63,7 @@ class TableStatisticsCollector implements SwitchDataCollector {
         this.pollInterval = pollInterval;
         task.cancel();
         task = new InternalTimerTask();
-        timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000);
+        timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000L);
     }
 
     private class InternalTimerTask extends TimerTask {