$documents is empty

[ilyaDegtyarenko]

The "$documents is empty" error is thrown if empty array came in "insert()" method.

In mariaDB nothing happens in this situation.

[hlorofos]

This is actual, however as a workaround you could validate insert arguments to prevent this from happening.
For me it seems like previous mongoDB versions doesn't thrown that exception, so the driver itself might not be the reason.

[hans-thomas]

This error is thrown from mongodb/mongodb package. see
It will be fixed in the next upcoming version in the future.