Fix log context loss in async .NET Core apps. Migrate log4net from ThreadContext to LogicalThreadContext for seamless diagnostic flow.

In this post, we’ll cover how to use the filelog receiver in the OpenTelemetry Collector to parse JSON log lines from logs files.

Debugging you logger (log4net)

以前、紹介したlog4netでログを出力する方法でバッチを作成し、タスクスケジューラ(最上位権限での実行)経由で実行した ...

You may have noticed that activity on the public Log4cxx, Log4j, and Log4net repositories has slowed since December 2025. I want to reassure you that the projects are still being actively monitored...

以前、紹介したlog4netでログを出力する方法でバッチを作成し、タスクスケジューラ(最上位権限での実行)経由で実行した ...

Rockwell Automation reported critical vulnerabilities in its AADvance Standalone OPC-DA Server that could enable remote code execution on affected systems. The flaws, CVE-2018-1285 (CVSS 9.8) and CVE-2006-0743 (CVSS 5.3), involve improper input validation and an externally controlled format string in the log4net component, respectively. Affected versions include v2.01.510 and later. Users are urged to update to version v2.02 or later and implement security best practices like isolating control systems behind firewalls and using up-to-date VPNs for remote access.

discover why log4net remains a reliable choice for large-scale .net apps in 2026 offering stability performance and flexibility for modern logging needs

Logging shouldn’t be an afterthought. It should be **fast** , **structured** , and **governed** —without slowing your app down. Meet **CerbiStream**, a developer-first logging library built with governance and performance at its core. But how does it actually perform compared to industry staples like **Serilog** , **NLog** , and **Log4Net**? That’s what **CerbiStream.BenchmarkTests** was created to answer. ## 🔬 What’s Inside? This open-source benchmark suite uses BenchmarkDotNet to give you real, comparable results across popular logging frameworks. It includes: * 🔁 **Throughput tests** — logging 10k+ entries per run * 💾 **Memory benchmarks** — allocations, GC behavior, per-log overhead * 🧱 **Payload scenarios** — from flat logs to nested structured objects * ✅ **Governance enforcement** — CerbiStream uniquely validates required & forbidden fields All test outputs are saved under the `charts/` folder and are easy to extend. Want to add your own logger? Just plug it in. ## 📈 Sample Benchmark: Logs/sec Logger | Logs/sec (Structured) | Memory/Log | Governance? ---|---|---|--- CerbiStream | 🟢 82,000+ | ~128 B | ✅ Full support NLog | 🔵 84,000 | ~120 B | ❌ Serilog | 🟡 80,000 | ~146 B | ⚠️ Plugin only Log4Net | 🟠 60,000 | ~160 B | ❌ > ✅ CerbiStream is the only logger with **compile-time analyzers** and **runtime validation** for governance rules. More detailed charts → View Benchmarks ## ⚡ What Makes CerbiStream Different? builder.Logging.AddCerbiStream(options => { options.UseGovernanceFromJson("Configs/governance.json"); });