MongoDB Documentation, Release 3.0.4 • Indexes: Mongod now recognizes incompatible “future” text and geo index versions and exits gracefully (SERVER-12914$^{699}$) • Indexes: Fixed issue that can cause secondaries to fail replication when building the same index multiple times concurrently (SERVER-12662$^{700}$) • Indexes: Fixed issue that can cause index corruption on the tenth index in a collection if the index build fails (SERVER-12481$^{701}$) • Indexes: Introduced versioning for text and geo indexes to ensure backwards compatibility (SERVER-12175$^{702}$) • Indexes: Disallowed building indexes on the system.indexes collection, which can lead to initial sync failure on secondaries (SERVER-10231$^{703}$) • Sharding: Avoid frequent immediate balancer retries when config servers are out of sync (SERVER-12908$^{704}$) • Sharding: Add indexes to locks collection on config servers to avoid long queries in case of large numbers of collections (SERVER-12548$^{705}$) • Sharding: Fixed issue that can corrupt the config metadata cache when sharding collections concurrently (SERVER-12515$^{706}$) • Sharding: Don’t move chunks created on collections with a hashed shard key if the collection already contains data (SERVER-9259$^{707}$) • Replication: Fixed issue where node appears to be down in a replica set during a compact operation (SERVER- 12264$^{708}$) • Replication: Fixed issue that could cause delays in elections when a node is not vetoing an election (SERVER- 12170$^{709}$) • Replication: Step down all primaries if multiple primaries are detected in replica set to ensure correct election result (SERVER-10793$^{710}$) • Replication: Upon clock skew detection, secondaries will switch to sync directly from the primary to avoid sync cycles (SERVER-8375$^{711}$) • Runtime: The SIGXCPU signal is now caught and mongod writes a log message and exits gracefully (SERVER- 12034$^{712}$) • Runtime: Fixed issue where mongod fails to start on Linux when /sys/dev/block directory is not readable (SERVER-9248$^{713}$) • Windows: No longer zero-fill newly allocated files on systems other than Windows 7 or Windows Server 2008 R2 (SERVER-8480$^{714}$) $^{700}$https://jira.mongodb.org/browse/SERVER-12662 $^{699}$https://jira.mongodb.org/browse/SERVER-12914 $^{701}$https://jira.mongodb.org/browse/SERVER-12481 $^{702}$https://jira.mongodb.org/browse/SERVER-12175 $^{704}$https://jira.mongodb.org/browse/SERVER-12908 $^{703}$https://jira.mongodb.org/browse/SERVER-10231 $^{705}$https://jira.mongodb.org/browse/SERVER-12548 $^{706}$https://jira.mongodb.org/browse/SERVER-12515 $^{707}$https://jira.mongodb.org/browse/SERVER-9259 $^{708}$https://jira.mongodb.org/browse/SERVER-12264 $^{709}$https://jira.mongodb.org/browse/SERVER-12170 $^{710}$https://jira.mongodb.org/browse/SERVER-10793 $^{711}$https://jira.mongodb.org/browse/SERVER-8375 $^{712}$https://jira.mongodb.org/browse/SERVER-12034 $^{713}$https://jira.mongodb.org/browse/SERVER-9248 $^{714}$https://jira.mongodb.org/browse/SERVER-8480 879 12.2. Previous Stable Releases