fix

src/main/java/com/mobvista/apptag/utils/GetPackageFromMongo.java

 package com.mobvista.apptag.utils;
 
 import com.mongodb.MongoClientSettings;
+import com.mongodb.ReadPreference;
 import com.mongodb.ServerAddress;
 import com.mongodb.client.*;
 import com.mongodb.client.model.Filters;
@@ -34,7 +35,7 @@ public class GetPackageFromMongo {
             MongoClientSettings settings = MongoClientSettings.builder()
                     .retryWrites(true)
                     .applyToConnectionPoolSettings(builder ->
-                            builder.maxConnectionIdleTime(600000, TimeUnit.MILLISECONDS))
+                            builder.maxConnectionIdleTime(6000, TimeUnit.MILLISECONDS))
                     .applyToClusterSettings(builder -> {
                         builder.hosts(Arrays.asList(new ServerAddress(mongoUrl, 27017)));
                     }).build();
@@ -46,6 +47,8 @@ public class GetPackageFromMongo {
 
             // 连接到数据库
             MongoDatabase mongoDatabase = mongoClient.getDatabase("new_adn");
+            mongoDatabase.withReadPreference(ReadPreference.secondary());
+
             System.out.println("Connect to database successfully");
 
             MongoCollection<Document> collection = mongoDatabase.getCollection("campaign");