milvus-io/milvus v2.5.15

milvus-2.5.15

on GitHub

v2.5.15

Release date: July 23, 2025

We're excited to announce Milvus 2.5.15! This version enhances your experience by fixing a series of functionality bugs, including ones that may severely damage the metadata causing data loss when collection is renamed. It also delivers a range of general performance and stability enhancements, while resolving numerous bugs to ensure a more robust system. We encourage you to upgrade to 2.5.15, especially if you are currently on 2.5.14, and explore these latest updates!

Improvements

• Updated Knowhere version to fix a sparse vector brute force bug (#43398).
• Implemented meta saving with txn limits (#43287).
• Applied load config changes after QueryCoord restart (#43236).
• Refined variable-length-type memory usage (#43093).
• Reordered RootCoord shutdown to be last in coordinator stop sequence (#43024).
• Updated CMake version to 3.31.8 (#43004).

Bug fixes

• Skipped remove operation if key exists in save set (#43426).
• Fixed null bitmap offset alignment when loading multi-chunk data (#43411, #43342).
• Updated Tantivy to fix directory removing race condition (#43401).
• Fixed an issue by calling AlterCollection only when renaming collections (#43421).
• Made MultiSaveAndRemove execute removal operations first (#43409).
• Used disk segment max size for collections with both sparse and dense vectors (#43195).
• Fixed text match bug by adapting to multi-chunk model (#43297).
• Fixed incorrect bitset for division comparison when the right operand is negative (#43180).
• Voided unnecessary copying when getting JSON chunks (#43183, #43202).
• Prevented delegator from becoming unserviceable due to shard leader changes (#43309).
• Fixed text match index and JSON key stats index leaks when segments are released (#43308).
• Fixed RegeneratePartitionStats failure after restoring clustering compaction tasks (#43206).
• Added error handling for invalid function parameters to prevent panics (#43190).
• Removed space trimming logic when validating collection names (#43138).
• Added field mmap property checks before applying collection-level settings (#43091).
• Fixed index creation being blocked by failed sort stats (#43061).
• Fixed exclude nodes clearing logic in load balancer retry mechanism (#43002).