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[6.1] Fix connection pool concurrency issue (#3632) - #3653
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Pull Request Overview
This PR addresses a connection pool concurrency issue by improving semaphore handling and includes comprehensive stress tests to validate the fix. It ports the changes from PR #3632 to the release/6.1 branch.
Key Changes
- Refactored semaphore acquisition and release pattern to use RAII-style resource management
- Added comprehensive connection pool stress tests with both synchronous and asynchronous scenarios
- Simplified error handling logic in pool creation requests
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| WaitHandleDbConnectionPool.cs | Introduces SemaphoreHolder class for safe semaphore management and refactors pool creation logic |
| ConnectionPoolStressTest.cs | New comprehensive test class for validating connection pool behavior under concurrent load |
| Microsoft.Data.SqlClient.ManualTesting.Tests.csproj | Adds the new stress test to the project compilation |
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## release/6.1 #3653 +/- ##
===============================================
+ Coverage 69.69% 70.06% +0.37%
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Files 281 279 -2
Lines 62413 61746 -667
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- Hits 43500 43264 -236
+ Misses 18913 18482 -431
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Ports #3632 to release/6.1