WildFly 27 Alpha4 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

Using RHOSAK from WildFly

Introduction RHOSAK (full name: Red Hat OpenShift Streams for Apache Kafka) is a cloud service hosted by Red Hat which makes setting up, managing and scaling Apache Kafka instances very easy. Also, you get the peace of mind of knowing the instances are patched with the latest security fixes. Apache Kafka is an open source, distributed streaming platform that enables (among other things) the development of real-time, event-driven applications. WildFly integrates with Apache Kafka via...

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WildFly 27 Alpha4 is released

Today we have released the 27.0.0.Alpha4 version of WildFly, now available on the downloads page. This release serves as a major milestone on our way toward support for Jakarta EE 10 in WildFly, as it is the first release of standard WildFly that is based on the Jakarta EE APIs that are planned for the upcoming Jakarta EE 10 release. Until this release, only WildFly Preview has offered any kind of support for Jakarta EE...

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Use the wildfly-maven-plugin to create a Docker image of your application

In this article, we will explain how a developer using the Docker image for WildFly can take advantage of the new capabilities of the wildlfy-maven-plugin and the new WildFly runtime image to build their container image. We will describe the changes required to move to this new architecture. Once the changes are done, we will provide some examples of the benefits that can be gained from this new architecture. WildFly, Docker, S2I and what are...

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Vlog: Encrypting a Filesystem Realm

This video demonstrates how to enable encryption for new filesystem realms, and how to encrypt pre-existing filesystem realms.

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Securing Jakarta Enterprise Beans with mutual TLS authentication

A demonstration on how to configure Elytron for secure connections to EJBs, using mutual TLS, SASL authentication mechanisms, and credential stores.

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Vlog: WildFly gRPC

This video introduces support for gRPC in WildFly.

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Vlog: Interview with Farah Juma

Another interview for our WildFly open source rockstars series.

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Vlog: Configure TLS in WildFly using Let’s Encrypt certificate authority

This video demonstrates how you can configure TLS using the Let’s Encrypt certificate authority with the WildFly CLI.

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