Release Notes for MongoDB 2.4

2.4.14 – April 28, 2015

• Init script sets process ulimit to different value compared to documentation SERVER-17780
• Compute BinData length in v8 SERVER-17647
• Upgrade PCRE Version from 8.30 to Latest SERVER-17252
• 2.4.14 Changelog.
• All 2.4.14 improvements .

2.4.13 – February 25, 2015

• Enforce BSON BinData length validation SERVER-17278
• Disable SSLv3 ciphers SERVER-15673
• Improve BSON validation SERVER-17264
• 2.4.13 Changelog.
• All 2.4.13 improvements .

2.4.12 – October 16, 2014

• Partially written journal last section causes recovery to fail SERVER-15111 .
• Explicitly zero .ns files on creation SERVER-15369 .
• 2.4.12 Changelog.
• All 2.4.12 improvements .

2.4.11 – August 18, 2014

• Fixed potential information leak: SERVER-14268 .
• Resolved issue were an _id with a $prefix field caused replication failure due to unvalidated insert SERVER-12209 .
• Addressed issue where updates to documents with text-indexed fields could lead to incorrect entries SERVER-14738 .
• Resolved issue where creating descending index on _id could corrupt namespace SERVER-14833 .
• 2.4.11 Changelog.
• All 2.4.11 improvements .

2.4.10 – April 4, 2014

• Performs fast file allocation on Windows when available SERVER-8480 .
• Start elections if more than one primary is detected SERVER-10793 .
• Changes to allow safe downgrading from v2.6 to v2.4 SERVER-12914 , SERVER-12175 .
• Fixes for edge cases in index creation SERVER-12481 , SERVER-12956 .
• 2.4.10 Changelog.
• All 2.4.10 improvements .

2.4.9 – January 10, 2014

• Fix for instances where mongos incorrectly reports a successful write SERVER-12146 .
• Make non-primary read preferences consistent with slaveOK versioning logic SERVER-11971 .
• Allow new sharded cluster connections to read from secondaries when primary is down SERVER-7246 .
• All 2.4.9 improvements .

2.4.8 – November 1, 2013

• Increase future compatibility for 2.6 authorization features SERVER-11478 .
• Fix dbhash cache issue for config servers SERVER-11421 .
• All 2.4.8 improvements .

2.4.7 – October 21, 2013

• Fixed over-aggressive caching of V8 Isolates SERVER-10596 .
• Removed extraneous initial count during mapReduce SERVER-9907 .
• Cache results of dbhash command SERVER-11021 .
• Fixed memory leak in aggregation SERVER-10554 .
• All 2.4.7 improvements .

2.4.6 – August 20, 2013

• Fix for possible loss of documents during the chunk migration process if a document in the chunk is very large SERVER-10478 .
• Fix for C++ client shutdown issues SERVER-8891 .
• Improved replication robustness in presence of high network latency SERVER-10085 .
• Improved Solaris support SERVER-9832 , SERVER-9786 , and SERVER-7080 .
• All 2.4.6 improvements .

2.4.5 – July 3, 2013

• Fix for CVE-2013-4650 Improperly grant user system privileges on databases other than local SERVER-9983 .
• Fix for CVE-2013-3969 Remotely triggered segmentation fault in Javascript engine SERVER-9878 .
• Fix to prevent identical background indexes from being built SERVER-9856 .
• Config server performance improvements SERVER-9864 and SERVER-5442 .
• Improved initial sync resilience to network failure SERVER-9853 .
• All 2.4.5 improvements .

2.4.4 – June 4, 2013

• Performance fix for Windows version SERVER-9721
• Fix for config upgrade failure SERVER-9661 .
• Migration to Cyrus SASL library for MongoDB Enterprise SERVER-8813 .
• All 2.4.4 improvements .

2.4.3 – April 23, 2013

• Fix for mongo shell ignoring modified object’s _id field SERVER-9385 .
• Fix for race condition in log rotation SERVER-4739 .
• Fix for copydb command with authorization in a sharded cluster SERVER-9093 .
• All 2.4.3 improvements .

2.4.2 – April 17, 2013

• Several V8 memory leak and performance fixes SERVER-9267 and SERVER-9230 .
• Fix for upgrading sharded clusters SERVER-9125 .
• Fix for high volume connection crash SERVER-9014 .
• All 2.4.2 improvements

2.4.1 – April 17, 2013

• Fix for losing index changes during initial sync SERVER-9087
• All 2.4.1 improvements .

Text Search

Add support for text search of content in MongoDB databases as a beta feature. See Text Indexes for more information.

Geospatial Support Enhancements

• Add new 2dsphere index. The new index supports GeoJSON objects Point, LineString, and Polygon. See 2dsphere Indexes and Geospatial Queries.
• Introduce operators $geometry, $geoWithin and $geoIntersects to work with the GeoJSON data.

Hashed Index

Add new hashed index to index documents using hashes of field values. When used to index a shard key, the hashed index ensures an evenly distributed shard key. See also Hashed Sharding.

Improvements to the Aggregation Framework

• Improve support for geospatial queries. See the $geoWithin operator and the $geoNear pipeline stage.
• Improve sort efficiency when the $sort stage immediately precedes a $limit in the pipeline.
• Add new operators $millisecond and $concat and modify how $min operator processes null values.

Changes to Update Operators

• Add new $setOnInsert operator for use with upsert .
• Enhance functionality of the $push operator, supporting its use with the $each, the $sort, and the $slice modifiers.

Additional Limitations for Map-Reduce and $where Operations

The mapReduce command, group command, and the