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Introducing FusionReactor 5

FusionReactor is a real-time application performance monitor, designed for production environments and supporting a range of J2EE servers, including JBoss, Tomcat, Jetty, Glassfish. As a pro-active monitor, it increases server stability and performance by continuously examining applications, servers and databases to identify, highlight and address issues before they impact critical processes. FusionReactor allows you to discover, visualize and protect against common web application performance problems through graphs and logs. Whether used for production monitoring or as a developer, a tool like FusionReactor is key to solving many common server problems.

Getting Started

Downloading and Installing FusionReactor

We are assuming you've downloaded and installed FusionReactor already; if not, go ahead and install it now. The installation process is easy – in almost every case the installer package will take care of all the details. Read the installation guide for details on how to install FusionReactor if you haven't already installed FusionReactor.

Updating FusionReactor from a previous version

If you are updating from a previous version of FusionReactor, it is important to read our Technote on Updating FusionReactor.

Accessing FusionReactor

If you already have FusionReactor installed you can typically access it in one of two different ways:

FusionReactor's Internal Web Server

You can call FusionReactor directly from a web browser with a URL like this: 

You must use the correct IP address and port for the FusionReactor instance you are trying to access.

Your External Web Server

You can often access FusionReactor from your external web server with a URL like this:

Notice that we have used an extension (.jsp in this case) that the external web server maps to the monitored application engine. This is so that the request is passed to FusionReactor which runs inside the application engine. Access to FusionReactor from the external web server can be configured on or off.


After installing, you will need to enter your license key and activate it. This is usually straight forward, but if you're not connected to the Internet to automatically activate your license, then click here to find out how to perform a manual activation.


There are many different scenarios in which FusionReactor is used, each with its own conditions, and each requiring a different configuration. The following are links to sample configurations for short term (immediate) troubleshooting and longer-term production monitoring.

  • Configuring FusionReactor in emergencies
  • Log files can be critical to understanding what's going on, on your server - read about log file's and how to configure them.


We welcome feedback on all our products and publications. To discover the various ways of contacting us, please use our contact page. We will address your feedback as quickly as possible.

Support Mailbox

You can mail us FusionReactor questions at:

Google Group

We also provide a Google Group for the community to ask questions in.

We check and reply to this group regularly, so it's also worth searching to see if your question has already been answered.

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