WildFly 21 Final is now available

WildFly is a powerful, modular, & lightweight application server that helps you build amazing applications.


Configuration in WildFly is centralized, simple and user-focused. The configuration file is organized by subsystems that you can easily comprehend and no internal server wiring is exposed. All management capabilities are exposed in a unified manner across many forms of access. These include a CLI, a web based administration console, a native Java API, an HTTP/JSON based REST API, and a JMX gateway. These options allow for custom automation using the tools and languages that best fit your needs.


WildFly does classloading right. It uses JBoss Modules to provide true application isolation, hiding server implementation classes from the application and only linking with JARs your application needs. Visibility rules have sensible defaults, yet can be customized. The dependency resolution algorithm means that classloading performance is not affected by the number of versions of libraries you have installed.


WildFly takes an aggressive approach to memory management. The base runtime services were developed to minimize heap allocation by using common cached indexed metadata over duplicate full parses, which reduces heap and object churn. The administration console is 100% stateless and purely client driven. It starts instantly and requires zero memory on the server. These optimizations combined enable WildFly to run with stock JVM settings and also on small devices while leaving more headroom for application data and supports higher scalability.

Standards Based

WildFly implements the latest in enterprise Java standards from Jakarta EE and Eclipse MicroProfile. These improve developer productivity by providing rich enterprise capabilities in easy to consume frameworks that eliminate boilerplate and reduce technical burden. This allows your team to focus on the core business needs of your application. By building your application on standards you retain the flexibility to migrate between various vendor solutions.

Latest News

WildFly Bootable JAR is final!

Bootable JAR Maven plugin 2.0.0.Final has been released. Using WildFly 21 you can now build self-contained JAR file to run microservices.

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WildFly 21 is released!

I’m excited to announce that the WildFly 21 Final zip is now available for download. Bootable JAR / Galleon Layers The biggest thing in WildFly 21 is Jean-Francois Denise and the team have added GA-level support for the Bootable JAR feature that we’ve been working on over the last two releases. The bootable jar feature allows you to add a maven plugin to your application’s pom and have your build package your application deployment and...

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Biased locking removed from Java - does it affect you ?

In Java 15 *biased locking* has been deprecated as per JEP 374. This means the default setting has been switched from enabled to disabled and the plan is to remove support for it from the Java Virtual Machine in a pending release. We need your help seeing if this affects WildFly performance in your application.

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Introducing the WildFly MicroProfile GraphQL Feature Pack

I am pleased to announce the 1.0.0.Beta1 release of the MicroProfile GraphQL feature pack for WildFly. It offers experimental support for the MicroProfile GraphQL 1.0 specification, implemented by SmallRye GraphQL. MicroProfile GraphQL - link to the specification. SmallRye GraphQL - link to the underlying implementation. The source code for the feature pack can be found on GitHub. Installing the feature pack For now, the GraphQL support is distributed as a feature pack rather than integrated...

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WildFly 20.0.1 is released!

WildFly 20.0.1.Final is now available for download. It’s been about a month since the WildFly 20 release, so it’s time for a small bug fix update, WildFly 20.0.1. The full list of issues resolved in WildFly 20.0.1 is available here. Issues resolved in the WildFly Core 12.0.2 and 12.0.3 releases included with WildFly 20.0.1 are available here and here. Onward to WildFly 21! Enjoy.

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WildFly and Jakarta EE 9

Congratulations to the Jakarta EE community for the recent great progress on Jakarta EE 9! The Jakarta EE community has been making great strides in its work on Jakarta EE 9, and given today’s Jakarta EE 9 milestone release I wanted to give the WildFly community an update on what’s been going on regarding EE 9 in WildFly and a heads up on what I expect will be happening over the summer and the rest...

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Introducing the WildFly MicroProfile Reactive Specifications Feature Pack

I am pleased to announce the 1.0.0.Beta1 release of the MicroProfile Reactive specifications feature pack for WildFly. It offers experimental support for the following MicroProfile specifications, which all focus on the reactive area: MicroProfile Reactive Messaging 1.0 - this is a framework for building event-driven, data streaming and event sourcing applications using CDI. The streams, or channels, can be backed by a variety of messaging technologies. We currently ship connectors for: Apache Kafka, AMQP and...

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A bootable JAR for WildFly 20

Introduction Now that WildFly supports Eclipse Microprofile this seems the appropriate time to introduce a way to package a WildFly application as a bootable JAR (also known as a "fat JAR"). Bootable JAR packaging is well suited for microservices to be run on cloud and bare metal. A bootable JAR allows us to package both the container and the application in a single JAR file and execute it with a simple command such as java...

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