MongoPoolClearedError随机抛出问题排查求助

我的数据库每日多次在查询过程中崩溃，抛出如下错误：

PoolClearedError [MongoPoolClearedError]: Connection pool for db2.prod.someDomain.com:27017 was cleared because another operation failed with: "connection <monitor> to [ip:v6:add:ress::]:27017 timed out"
    at ConnectionPool.processWaitQueue (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/cmap/connection_pool.js:520:82)
    at ConnectionPool.clear (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/cmap/connection_pool.js:251:14)
    at updateServers (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/sdam/topology.js:461:29)
    at Topology.serverUpdateHandler (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/sdam/topology.js:332:9)
    at Server.<anonymous> (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/sdam/topology.js:444:77)
    at Server.emit (node:events:513:28)
    at Server.emit (node:domain:489:12)
    at markServerUnknown (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/sdam/server.js:298:12)
    at Monitor.<anonymous> (/var/www/api/prod/node_modules/mongoose/node_modules/mongodb/lib/sdam/server.js:58:46)
    at Monitor.emit (node:events:513:28) {
  address: 'db.prod.someDomain.com:27017',
  [Symbol(errorLabels)]: Set(1) { 'RetryableWriteError' }
}

已尝试降低数据库读写速率，但仍未定位崩溃原因。该问题随机出现、无法复现，服务器监控显示CPU、内存及SSD I/O均处于低占用水平。

环境配置信息 #

mongoose last version
mongodb js driver last version
mongodb last version
1 replicaset with 2 nodes
Each node has 32GO ram + 12 core Xeon processor
Full database size is around 130GO, biggest collection has 70M documents, total index size is around 24GO

恳请协助排查该问题。

内容的提问来源于stack exchange，提问作者Poyoman