Orion refuses to start (location.coords_2dsphere index error)

Question

After upgrading to Orion 0.22.0 (applying the documented migration procedure), Orion refuses to start, existing with the following message:

INFO@10:51:50  contextBroker.cpp[1191]: Connected to mongo at mongodb1:27017:orion 
terminate called after throwing an instance of 'mongo::OperationException'   
   what():  OperationException: { ok: 0.0, errmsg: "Index with name:
location.coords_2dsphere already exists with different options", code: 85 }

I'm using a MongoDB replica set as database.

Answer 1

The solution to this issue (which we have been observed sometimes in replica set environments) is to remove the location.coords_2dsphere index, i.e. executing the following command in the mongo shell (connected to the primary node):

db.entities.dropIndex({"location.coords": "2dsphere"})

In the case of using Orion in multiservice mode, you have to apply the above command to each one of the tenant databases.

Orion will re-create the index next time it starts.