JinwooHwang opened a new pull request, #7945:
URL: https://github.com/apache/geode/pull/7945
## Overview
This PR upgrades the `HdrHistogram` dependency from version 2.1.12 to 2.2.2,
bringing in bug fixes, performance improvements, and enhanced histogram
functionality for better latency tracking and metrics collection.
## Changes Made
### Dependency Version Updates
- **HdrHistogram**: `2.1.12` → `2.2.2`
### Files Modified
1.
**build-tools/geode-dependency-management/src/main/groovy/org/apache/geode/gradle/plugins/DependencyConstraints.groovy**
- Added explicit version constraint: `api(group: 'org.hdrhistogram',
name: 'HdrHistogram', version: '2.2.2')`
2. **geode-assembly/src/integrationTest/resources/assembly_content.txt**
- Updated JAR reference: `HdrHistogram-2.1.12.jar` →
`HdrHistogram-2.2.2.jar`
3.
**geode-assembly/src/integrationTest/resources/gfsh_dependency_classpath.txt**
- Updated classpath reference: `HdrHistogram-2.1.12.jar` →
`HdrHistogram-2.2.2.jar`
4.
**geode-server-all/src/integrationTest/resources/dependency_classpath.txt**
- Updated classpath reference: `HdrHistogram-2.1.12.jar` →
`HdrHistogram-2.2.2.jar`
## Validation
### Build Validation
All build tasks completed successfully:
- ✅ `build`
### Test Validation
- ✅ All tests passed with `gradlew test`
## About HdrHistogram
HdrHistogram is a high-performance histogram implementation used by
Micrometer for latency tracking and metrics collection in Apache Geode. It
provides accurate percentile measurements with minimal overhead and memory
footprint.
## Benefits
- **Improved accuracy**: Enhanced percentile calculations for more precise
latency measurements
- **Performance improvements**: Better memory efficiency and reduced overhead
- **Bug fixes**: Includes all bug fixes from versions 2.1.13 through 2.2.2
- **Thread safety**: Enhanced thread safety improvements for concurrent usage
- **Better observability**: Improved metrics collection and monitoring
capabilities
## Compatibility
- Fully backward compatible with existing code
- No API changes affecting current usage
- All existing tests pass without modification
- No changes required to application logic
## Release Notes References
For detailed information about changes between versions, see:
- [HdrHistogram
Releases](https://github.com/HdrHistogram/HdrHistogram/releases)
---
**Note**: This upgrade is part of ongoing dependency maintenance to keep the
project up-to-date with the latest stable versions of its dependencies and
ensure optimal performance for metrics and monitoring functionality.
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