According to the upgrade instructions [1], the only supported upgrade path from sharded 2.0 clusters is via 2.2. [1] http://docs.mongodb.org/manual/release-not

According to the upgrade instructions [1], the only supported upgrade path from sharded 2.0 clusters is via 2.2. [1] http://docs.mongodb.org/manual/release-notes/2.4-upgrade/#upgrade-a-sharded-cluster-from-mongodb-2-2-to-mongodb-2-4 http://docs.mongodb.org/manual/release-notes/2.4-upgrade/#up...