分片集群，mongo日志报错Pool for node1:27017 has expired.

Question

mongodb版本4.4.5
分片集群 2个P-S-A分片
在各个数据节点的日志中，偶尔出现如下错误日志:
{"t":{"$date":"2021-08-26T07:20:43.659+08:00"},"s":"I", "c":"CONNPOOL", "id":22572, "ctx":"MirrorMaestro","msg":"Dropping all pooled connections","attr":{"hostAndPort":"<ipaddress>:<port>","error":"ShutdownInProgress: Pool for <ipaddress>:<port> has expired."}}
请问大家有遇到过这个错误吗，有什么影响？目前查看rs.status()是正常。