diff --git a/ip-learning-spark/src/main/java/cn/ac/iie/service/read/ReadHistoryArangoData.java b/ip-learning-spark/src/main/java/cn/ac/iie/service/read/ReadHistoryArangoData.java
index 4ccd6e1..2fdd582 100644
--- a/ip-learning-spark/src/main/java/cn/ac/iie/service/read/ReadHistoryArangoData.java
+++ b/ip-learning-spark/src/main/java/cn/ac/iie/service/read/ReadHistoryArangoData.java
@@ -107,6 +107,12 @@ public class ReadHistoryArangoData<T extends BaseDocument> extends Thread {
     private void deleteDistinctClientIpByTime(T doc) {
         ArrayList<String> distCip = (ArrayList<String>) doc.getAttribute("DIST_CIP");
         ArrayList<Long> distCipTs = (ArrayList<Long>) doc.getAttribute("DIST_CIP_TS");
+        if (distCip == null || distCip.isEmpty()){
+            doc.updateAttribute("DIST_CIP", new String[0]);
+            doc.updateAttribute("DIST_CIP_TS", new long[0]);
+            return;
+        }
+
         distCipTs.add(currentHour - RECENT_COUNT_HOUR * 3600);
         Collections.sort(distCipTs);
         int index = distCipTs.indexOf(currentHour - RECENT_COUNT_HOUR * 3600);
diff --git a/ip-learning-spark/src/main/resources/application.properties b/ip-learning-spark/src/main/resources/application.properties
index 3aded0c..622dc28 100644
--- a/ip-learning-spark/src/main/resources/application.properties
+++ b/ip-learning-spark/src/main/resources/application.properties
@@ -27,14 +27,14 @@ arangoDB.ttl=3600
 thread.pool.number=5
 
 #读取clickhouse时间范围方式，0：读取过去一小时；1：指定时间范围
-clickhouse.time.limit.type=0
-read.clickhouse.max.time=1571245220
-read.clickhouse.min.time=1571245210
+clickhouse.time.limit.type=1
+read.clickhouse.max.time=1598246519
+read.clickhouse.min.time=1597161600
 
 #读取arangoDB时间范围方式，0：正常读；1：指定时间范围
 arango.time.limit.type=0
-read.arango.max.time=1571245320
-read.arango.min.time=1571245200
+read.arango.max.time=1598246519
+read.arango.min.time=1597161600
 
 arangoDB.read.limit=
 update.arango.batch=10000