Issue:

From the linked support request, it appears there is an incompatibility between mongodump version 4.2 and MongoDB 3.4.22.

The error as reported by the customer is:

The mongodb dump for collection deviceOperation on cluster <CLUSTER_NAME> is failing with the following error.
==========
Failed: error creating intents to dump: error counting <CLUSTER_NAME>.deviceOperation: connection
==========

The command which triggered this error was:

mongodump --uri "mongodb://<User>:<Password>@<NAMES_OF_ALL_NODES>/<DATABASE_NAME>?ssl=true&replicaSet=<CLUSTER_NAME>&authSource=admin" --out <FILENAME. --collection <COLLECTION_NAME>

Workaround:

Use version 4.0.x of the mongodump.

—

• Please verify if this is a bug, or a known incompatibility.
• Please review the other tools in the 4.2 release to determine if there are other incompatibilities/bugs with supported previous versions of MongoDB.
• If this is a known incompatibility, or a fix is not planned, please open a documentation ticket to update our customer-facing documentation with the information.