MongoDB Documentation, Release 3.0.4 Querying Replication Sharding Chapter 12. Release Notes 786 $^{5}$https://jira.mongodb.org/browse/SERVER-18364 $^{6}$https://jira.mongodb.org/browse/SERVER-16265 $^{7}$https://jira.mongodb.org/browse/SERVER-15225 $^{8}$https://jira.mongodb.org/browse/SERVER-13875 $^{9}$https://jira.mongodb.org/browse/SERVER-18566 $^{10}$https://jira.mongodb.org/browse/SERVER-18511 $^{11}$https://jira.mongodb.org/browse/SERVER-18409 $^{12}$https://jira.mongodb.org/browse/SERVER-18326 $^{13}$https://jira.mongodb.org/browse/SERVER-17923 $^{14}$https://jira.mongodb.org/browse/SERVER-17913 $^{15}$https://jira.mongodb.org/browse/SERVER-17807 $^{16}$https://jira.mongodb.org/browse/SERVER-15252 $^{17}$https://jira.mongodb.org/browse/SERVER-15192 $^{18}$https://jira.mongodb.org/browse/SERVER-18190 $^{19}$https://jira.mongodb.org/browse/SERVER-18566 $^{20}$https://jira.mongodb.org/browse/SERVER-18822 $^{21}$https://jira.mongodb.org/browse/SERVER-18246 • SERVER-18822 20 Sharded clusters with WiredTiger primaries may lose writes during chunk migration • SERVER-18566 19 Primary member can trip fatal assertion if stepping down while running findAndModify op resulting in an upsert • SERVER-18190 18 Secondary reads block replication • SERVER-15192 17 Make all logOp listeners rollback-safe • SERVER-15252 16 Write unit tests of ScatterGatherRunner • SERVER-17807 15 drain ops before restarting initial sync • SERVER-17913 14 New primary should log voters at default log level • SERVER-17923 13 Creating/dropping multiple background indexes on the same collection can cause fatal error on secondaries • SERVER-18326 12 Rollback attempted during initial sync is fatal • SERVER-18511 10 Report upstream progress when initial sync completes • SERVER-18566 9 Primary member can trip fatal assertion if stepping down while running findAndModify op resulting in an upsert • SERVER-18409 11 Retry failed heartbeats before marking a node as DOWN • SERVER-18364 5 Ensure non-negation predicates get chosen over negation predicates for multikey index bounds construction • SERVER-16265 6 Add query details to getmore entry in profiler and db.currentOp() • SERVER-15225 7 CachedPlanStage should execute for trial period and re-plan if query performs poorly • SERVER-13875 8 ensureIndex() of 2dsphere index breaks after upgrading to 2.6 (with the new createIndex command) • SERVER-18246 21 getmore on secondary in recovery mode can crash mongos