diff --git a/pav-websocket/src/main/java/com/palnet/comn/utils/DateUtils.java b/pav-websocket/src/main/java/com/palnet/comn/utils/DateUtils.java
index 5b5082c..23c12fe 100644
--- a/pav-websocket/src/main/java/com/palnet/comn/utils/DateUtils.java
+++ b/pav-websocket/src/main/java/com/palnet/comn/utils/DateUtils.java
@@ -111,6 +111,14 @@ public class DateUtils {
 		
 	}
 	
+	public static long diffSecond(Instant firstDate, Instant secondDate) {
+		
+	    long diffDate = secondDate.getEpochSecond() - firstDate.getEpochSecond();
+	    
+	    return diffDate;
+	    
+	}
+	
 	public static long diffMinute(Instant firstDate , Instant secondDate) {
 		
 		long diffDate = secondDate.getEpochSecond() - firstDate.getEpochSecond();
diff --git a/pav-websocket/src/main/java/com/palnet/process/scheduler/GpHistoryScheduler.java b/pav-websocket/src/main/java/com/palnet/process/scheduler/GpHistoryScheduler.java
index 5195725..2c21875 100644
--- a/pav-websocket/src/main/java/com/palnet/process/scheduler/GpHistoryScheduler.java
+++ b/pav-websocket/src/main/java/com/palnet/process/scheduler/GpHistoryScheduler.java
@@ -32,7 +32,7 @@ public class GpHistoryScheduler {
         if(Objects.nonNull(allHistory)) {
             allHistory.forEach((k, v) -> {
                 Instant serverRcvDt = DateUtils.stringToDatetime(v.getServerRcvDt());
-                long diffSecond = DateUtils.diffMinute(serverRcvDt, Instant.now());
+                long diffSecond = DateUtils.diffSecond(serverRcvDt, Instant.now());
 
                 if(diffSecond > timeLimit) {
                     gpHistoryShareContext.removeHistory(k);