MongoDB - Defect ID: 405713
createIndexes can implicitly create collections on shards without propagating the collection options

Info

On mongos, createIndexes is broadcast to all shards, rather than only shards that own data for the collection. So, createIndexes can implicitly create collections on shards that don't own data for the collection. When this happens, the collection is implicitly created without the right collection options (collation, compression, etc). This is a beginning-of-time bug: r3.4.6: https://github.com/mongodb/mongo/blob/r3.4.6/src/mongo/s/commands/commands_public.cpp#L228-L229 r3.2.15: https://github.com/mongodb/mongo/blob/r3.2.15/src/mongo/s/commands/commands_public.cpp#L209 v3.0.11: https://github.com/mongodb/mongo/blob/v3.0.11/src/mongo/s/commands_public.cpp#L361-L363 v2.6: https://github.com/mongodb/mongo/blob/v2.6/src/mongo/s/commands_public.cpp#L284 v2.4: https://github.com/mongodb/mongo/blob/v2.4/src/mongo/s/commands_public.cpp#L184 v2.2: https://github.com/mongodb/mongo/blob/v2.2/src/mongo/s/commands_public.cpp#L185 v2.0: https://github.com/mongodb/mongo/blob/v2.0/s/commands_public.cpp#L163

Top User Comments

max.hirschhorn@10gen.com commented on Fri, 21 Jul 2017 11:38:30 +0000: I think this ticket is a duplicate of the user-reported issue in SERVER-20659.

Steps to Reproduce