Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems. Learn more →
Top 10 Java Log4j Projects
-
Apache Log4j 2
Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.
Structured logging transforms debugging by providing a detailed, searchable record of an application’s state, including variable values, stack traces, and user actions. According to Gartner, organizations with robust logging systems resolve production issues 40% faster. Doug Crawford, President and Founder of Best Trade Schools, highlights their value: “Implementing a structured logging system… makes isolating the problem straightforward.” Tools like Sentry for real-time error tracking, Log4j for Java applications, or ELK Stack for log aggregation enable developers to pinpoint issues quickly, reducing the need for manual reproduction. For example, Sentry’s breadcrumb feature captures user actions leading to an error, offering a clear debugging trail.
-
CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
-
CVE-2021-44228-PoC-log4j-bypass-words
🐱💻 ✂️ 🤬 CVE-2021-44228 - LOG4J Java exploit - WAF bypass tricks
-
log4j-detector
A public open sourced tool. Log4J scanner that detects vulnerable Log4J versions (CVE-2021-44228, CVE-2021-45046, etc) on your file-system within any application. It is able to even find Log4J instances that are hidden several layers deep. Works on Linux, Windows, and Mac, and everywhere else Java runs, too! TAG_OS_TOOL, OWNER_KELLY, DC_PUBLIC
-
-
-
-
Log4jPatcher
A mitigation for CVE-2021-44228 (log4shell) that works by patching the vulnerability at runtime. (Works with any vulnerable java software, tested with java 6 and newer)
-
InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
-
cve-2021-44228-qingteng-online-patch
Hot-patch CVE-2021-44228 by exploiting the vulnerability itself.
-
-
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java Log4j discussion
Java Log4j related posts
-
Log4j: The Pain Just Keeps Going and Going
-
Log4Shell Update: Severity Upgraded 3.7 -> 9.0 for Second log4j Vulnerability (CVE-2021-45046) | LunaSec - v2.15 of Log4j has an RCE
-
Log4j 2.15.0 – Previously suggested mitigations may not be enough
-
Analysis of the 2nd Log4j CVE published earlier (CVE-2021-45046 / Log4Shell2)
-
A Blog about detection of Log4Shell
-
Zero-Day RCE Vulnerability CVE-2021-44228 aka Log4Shell: What We Know So Far
-
CrowdSec is now able to detect and mitigate log4j CVE-2021-44228
-
A note from our sponsor - InfluxDB
influxdata.com | 28 Apr 2025
Index
What are some of the best open-source Log4j projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Apache Log4j 2 | 3,468 |
| 2 | CVE-2021-44228-PoC-log4j-bypass-words | 937 |
| 3 | log4j-detector | 638 |
| 4 | LogCaptor | 393 |
| 5 | Herald | 75 |
| 6 | java-reverse-tcp | 61 |
| 7 | Log4jPatcher | 47 |
| 8 | cve-2021-44228-qingteng-online-patch | 26 |
| 9 | mdc4spring | 21 |
| 10 | yaslf4j | 1 |
Sponsored
CodeRabbit: AI Code Reviews for Developers
Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
coderabbit.ai