diff --git a/commons/src/main/java/com/navercorp/pinpoint/common/hbase/distributor/RangeOneByteSimpleHash.java b/commons/src/main/java/com/navercorp/pinpoint/common/hbase/distributor/RangeOneByteSimpleHash.java
index c3bf0489f..1ade1aff1 100644
--- a/commons/src/main/java/com/navercorp/pinpoint/common/hbase/distributor/RangeOneByteSimpleHash.java
+++ b/commons/src/main/java/com/navercorp/pinpoint/common/hbase/distributor/RangeOneByteSimpleHash.java
@@ -68,7 +68,7 @@ public class RangeOneByteSimpleHash implements RowKeyDistributorByHashPrefix.Has
 
     @Override
     public void init(String storedParams) {
-        this.mod = Integer.valueOf(storedParams);
+        this.mod = Integer.parseInt(storedParams);
     }
 
 }
diff --git a/profiler/src/main/java/com/navercorp/pinpoint/profiler/AgentInformationFactory.java b/profiler/src/main/java/com/navercorp/pinpoint/profiler/AgentInformationFactory.java
index fb636d2b3..8f529d2f5 100644
--- a/profiler/src/main/java/com/navercorp/pinpoint/profiler/AgentInformationFactory.java
+++ b/profiler/src/main/java/com/navercorp/pinpoint/profiler/AgentInformationFactory.java
@@ -41,10 +41,13 @@ public class AgentInformationFactory {
     }
 
     private void validateId(String id, String idName, int maxlen) {
+		if (id == null) {
+			throw new NullPointerException("id must not be null");
+		}
         // 에러 체크 로직을 bootclass 앞단으로 이동시켜야 함.
         // 아니면 여기서 체크해서 실패시 agent동작을 하지 않도록 하던가 하는 추가 동작을 해야함.
-        byte[] bytes = BytesUtils.toBytes(id);
-        if (bytes.length > maxlen) {
+        final byte[] bytes = BytesUtils.toBytes(id);
+		if (bytes.length > maxlen) {
             logger.warn("{} is too long(1~24). value={}", idName, id);
         }
     }
diff --git a/web/src/main/java/com/navercorp/pinpoint/web/filter/FromToResponseFilter1.java b/web/src/main/java/com/navercorp/pinpoint/web/filter/FromToResponseFilter1.java
index f3eee1d07..88ecfff66 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/filter/FromToResponseFilter1.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/filter/FromToResponseFilter1.java
@@ -56,15 +56,15 @@ public class FromToResponseFilter1 implements Filter {
 		String[] conditions = condition.split(",");
 		if (conditions.length == 2) { // from,to
 			findError = false;
-			fromResponseTime = Long.valueOf(conditions[0]);
-			toResponseTime = Long.valueOf(conditions[1]);
+			fromResponseTime = Long.parseLong(conditions[0]);
+			toResponseTime = Long.parseLong(conditions[1]);
 		} else if (conditions.length == 3) { // error,from,to
 			findError = ERROR.equals(conditions[0]);
 			if (!findError) {
 				throw new IllegalArgumentException("invalid conditions:" + condition);
 			}
-			fromResponseTime = Long.valueOf(conditions[1]);
-			toResponseTime = Long.valueOf(conditions[2]);
+			fromResponseTime = Long.parseLong(conditions[1]);
+			toResponseTime = Long.parseLong(conditions[2]);
 		} else if (conditions.length == 1) { // error only
 			findError = ERROR.equals(conditions[0]);
 			if (!findError) {