Problem Statement/Rationale

Running setDefaultRWConcern can create the config.settings collection. The collection should be created by an oplog with namespace config.$cmd, which is ignored by mongorestore. As a result, restoring the oplog dump errors out with the message:

Failed: restore error: error applying oplog: applyOps: (NamespaceNotFound) cannot apply insert or update operation on a non-existent namespace config.settings

Expected Results

It's unclear whether this should be supported.

Actual Results

Mongorestore fail with error.

Additional Notes

We should either fix this in mongorestore, or add a guardrail in mongodump to prevent creating unrestorable oplog files.