Exception in thread "main" com.mongodb.MongoInternalException: DBObject of size 5242897 is over Max BSON size 16777216

Perhaps it IS the intended behaviour to not allow queries or remove operation's query parameters to exceed 4mb - the limit in Bytes.MAX_OBJECT_SIZE, but this message is very strange, and can easily throw off a developer.

Note that in OutMessage.java we check max on one thing _mongo.getConnector().getMaxBsonObjectSize()

...but report it on something else - which incidentally initializes it correctly.
_mongo.getMaxBsonObjectSize()

if (objectSize > Math.max(_mongo.getConnector().getMaxBsonObjectSize(), Bytes.MAX_OBJECT_SIZE))

{ throw new MongoInternalException("DBObject of size " + objectSize + " is over Max BSON size " + _mongo.getMaxBsonObjectSize()); }