记录过多的"服务器描述"更改

Question

我有一个运行3.4的副本集,它由一个带有Mongoid5的Rails(4.2.7)应用程序使用(5.1.6)

我们越来越多地将"服务器描述已更改"发布到我们的日志记录系统,这些帖子根本没有指示更改(见下文).除了这些日志消息之外,平台运行正常.我在网上搜索过,找不到这可能意味着什么.以下是帖子的示例,每10秒钟发生一次.

D, [2016-12-14T07:49:53.882124 #20003] DEBUG -- : MONGODB | Server description for mongo2:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:49:53.892663 #20003] DEBUG -- : MONGODB | Server description for mongo1:27017 changed from 'primary' to 'primary'.
D, [2016-12-14T07:50:03.875711 #20003] DEBUG -- : MONGODB | Server description for mongo3:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:03.884555 #20003] DEBUG -- : MONGODB | Server description for mongo2:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:03.894815 #20003] DEBUG -- : MONGODB | Server description for mongo1:27017 changed from 'primary' to 'primary'.
D, [2016-12-14T07:50:13.878723 #20003] DEBUG -- : MONGODB | Server description for mongo3:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:13.886576 #20003] DEBUG -- : MONGODB | Server description for mongo2:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:13.900932 #20003] DEBUG -- : MONGODB | Server description for mongo1:27017 changed from 'primary' to 'primary'.
D, [2016-12-14T07:50:23.881659 #20003] DEBUG -- : MONGODB | Server description for mongo3:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:23.888644 #20003] DEBUG -- : MONGODB | Server description for mongo2:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:23.903119 #20003] DEBUG -- : MONGODB | Server description for mongo1:27017 changed from 'primary' to 'primary'.
D, [2016-12-14T07:50:33.884056 #20003] DEBUG -- : MONGODB | Server description for mongo3:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:33.890432 #20003] DEBUG -- : MONGODB | Server description for mongo2:27017 changed from 'secondary' to 'secondary'.
D, [2016-12-14T07:50:33.905094 #20003] DEBUG -- : MONGODB | Server description for mongo1:27017 changed from 'primary' to 'primary'.

有没有人对这可能是什么有任何想法？

谢谢.