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OfX v8.2.2

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@quyvu01 quyvu01 released this 18 Jan 17:24
· 38 commits to main since this release
v8.2.2
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OfX v8.2.2 Release Notes

Release Date: January 18, 2026

Overview

OfX v8.2.2 is a stability release that fixes a critical EF Core concurrency issue caused by DbContext reuse across concurrent requests.

Highlights

EF Core Concurrent Issue Fix

Fixed a critical bug where concurrent requests could cause EF Core errors due to DbContext being shared across multiple operations.

The Problem:

When multiple requests were processed simultaneously, they could share the same DbContext instance, leading to:

  • InvalidOperationException: A second operation started on this context before a previous operation completed
  • Race conditions in query execution
  • Inconsistent data retrieval

The Solution:

The EfQueryHandler now creates a new DI scope for each request, ensuring each operation gets its own DbContext instance.

// Before: Shared DbContext across concurrent requests
var dbContext = serviceProvider.GetRequiredService<TDbContext>();

// After: New scope per request
using var scope = serviceProvider.CreateScope();
var dbContext = scope.ServiceProvider.GetRequiredService<TDbContext>();

Thread Safety Guaranteed

Scenario Before After
Concurrent requests Race condition risk Isolated DbContext
Parallel queries Shared state issues Thread-safe
High load Intermittent failures Stable performance

Technical Details

How It Works

  1. Each request creates a new IServiceScope
  2. The scope provides a fresh DbContext instance
  3. The scope is disposed after the request completes
  4. No shared state between concurrent operations

Scope Lifetime

Request 1 ─→ [Scope 1] ─→ [DbContext 1] ─→ Query ─→ Dispose
Request 2 ─→ [Scope 2] ─→ [DbContext 2] ─→ Query ─→ Dispose
Request 3 ─→ [Scope 3] ─→ [DbContext 3] ─→ Query ─→ Dispose

Each request is completely isolated from others.

Files Changed

  • src/OfX.EntityFrameworkCore/EfQueryHandler.cs - Added scope creation per request

Upgrade Guide

This is a non-breaking patch release. Simply update the NuGet package:

dotnet add package OfX.EntityFrameworkCore --version 8.2.2

No code changes required. The fix is automatic.

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