I'm trying to repair a mongo database and am running into the following error early on:
Wed Jul 24 16:55:21 [initandlisten] ERROR: error: exception cloning object in local.system.replset
E11000 duplicate key error index: local.system.replset.$_id_ dup key: { : "replicaset-name" }
obj:{ _id: "replicaset-name", version: 92, members: [ { _id: 16, host: "host1:27032" },
{ _id: 17, host: "host2:27032" },
{ _id: 18, host: "host3:27032", priority: 0.0, hidden: true },
{ _id: 19, host: "host4:27032", priority: 6.0 },
{ _id: 20, host: "host5:27032", priority: 7.0 },
{ _id: 22, host: "host6:27032", priority: 4.0 },
{ _id: 23, host: "host7:27032", priority: 3.0 },
{ _id: 24, host: "host8:27032", votes: 0, priority: 0.0 } ] }
(replica set and host names have been sanitized for public posting)
To attempt the repair I shut down the mongod and started it up with
/usr/bin/mongod-2.2 -f /var/local/mongo/mongod.conf --nojournal --repair --repairpath /mnt/mongo_repair/
My mongod.conf consists of just two lines:
dbpath = /var/local/mongo/data/replicaset-name
port = 17000
The .conf normally did have a replSet declaration, but this was removed for the repair as I'm trying to run the repair on a secondary. (Per the docs repairs can only be done on primaries or standalones; so need to make it look like a standalone temporarily).
Any idea what the problem could be?