diff --git a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
index 582deca402f2..d4ef70f1040e 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
@@ -134,8 +134,7 @@ public ApplicationAgentList getApplicationAgentList(ApplicationAgentList.Key app
 
     @Override
     public Set<AgentInfo> getAgentsByApplicationName(String applicationName, long timestamp) {
-        long timeDiff = timestamp;
-        return this.getAgentsByApplicationName(applicationName, timestamp, timeDiff);
+        return this.getAgentsByApplicationName(applicationName, timestamp, timestamp);
     }
 
     @Override
@@ -143,9 +142,6 @@ public Set<AgentInfo> getAgentsByApplicationName(String applicationName, long ti
         if (applicationName == null) {
             throw new NullPointerException("applicationName must not be null");
         }
-        if (timeDiff < 0) {
-            throw new IllegalArgumentException("timeDiff must not be less than 0");
-        }
         if (timeDiff > timestamp) {
             throw new IllegalArgumentException("timeDiff must not be greater than timestamp");
         }