## 2.6.3 – Changes 

• SERVER-14302 517 Fixed: “Equality queries on _id with projection may return no results on sharded collec- tions” 

• SERVER-14304 518 Fixed: “Equality queries on _id with projection on _id may return orphan documents on sharded collections” 

## 2.6.2 – Changes 

## Security 

• SERVER-13727 519 The backup (page 410) authorization role now includes privileges to run the collStats command. 

• SERVER-13804 520 The built-in role restore (page 411) now has privileges on system.roles collection. 

• SERVER-13612 521 Fixed: “SSL-enabled server appears not to be sending the list of supported certificate issuers to the client” 

• SERVER-13753 522 Fixed: “ mongod may terminate if x.509 authentication certificate is invalid” 

• SERVER-13945 523 For replica set/sharded cluster member authentication (page 363), now matches x.509 clus- ter certificates by attributes instead of by substring comparison. 

• SERVER-13868 524 Now marks V1 users as probed on databases that do not have surrogate user documents. 

• SERVER-13850 525 Now ensures that the user cache entry is up to date before using it to determine a user’s roles in user management commands on mongos . 

• SERVER-13588 526 Fixed: “Shell prints startup warning when auth enabled” 

## Querying 

• SERVER-13731 527 Fixed: “Stack overflow when parsing deeply nested $not query” 

• SERVER-13890 528 Fixed: “Index bounds builder constructs invalid bounds for multiple negations joined by an $or “ 

• SERVER-13752 529 Verified assertion on empty $in clause and sort on second field in a compound index. 

• SERVER-13337 530 Re-enabled idhack for queries with projection. 

• SERVER-13715 531 Fixed: “Aggregation pipeline execution can fail with $or and blocking sorts” 

• SERVER-13714 532 Fixed: “non-top-level indexable $not triggers query planning bug” 

