monstache: Frequently seeing "connection timed out" errors

Hey Ryan,

Seeing these error (below) messages every few minutes in monstache logs.
ERROR 2019/01/17 18:35:57 Unable to dial MongoDB: dial tcp <ip>:27017: connect: connection timed out ERROR 2019/01/17 18:35:57 Unable to dial MongoDB: dial tcp <ip>:27017: connect: connection timed out

My connection settings are: [mongo-dial-settings] ssl = true read-timeout = 300 write-timeout = 300

[mongo-session-settings] socket-timeout = 300 sync-timeout = 300

Ingestion in production is also relatively slower compared to our dev tests. In about ~14hrs, only about 1.2 million documents have been transferred from mongo to ES, whereas in dev it only took a few hours to transfer 2.5+ million documents. The only difference between the tests was adding a namespace-regex in prod. Is filtering performance expensive?

Thanks!