Avoids a race condition when multiple server instances are backed by the MongoDB database. MongoDB does not have transactions, atomic upserts are used instead.
Avoids a race condition when multiple server instances are backed by the MongoDB database. MongoDB does not have transactions, atomic upserts are used instead.

niole/core,logankoester/core,evgenTraytyak/core,rawGem/ua-core,phocks/core,meteor-useraccounts/core,gwendall/core,jjeffwarner/core,jxm262/core,meteor-useraccounts/core,abernix/meteor-useraccounts-core,phocks/core,lucaslizama/core,niole/core,evgenTraytyak/core,dandv/core,PhilippSpo/core,challett/core,jjeffwarner/core,gevou/core,lucaslizama/core,gevou/core,rawGem/aus-core,jonxduo/core,ShawnOceanHu/core,logankoester/core