OpenJ9 builds available here!

250,000 hits in 24 hours!

What a crazy last week it has been for everyone at AdoptOpenJDK. We are very excited to have begun adding OpenJ9 builds to our website! The interest has been overwhelming and it was incredible to see our website reach well over 250,000 hits after a small thread on Reddit quickly became much more! The picture below from our Cloudflare analytics tool shows very clearly when the post was added to Reddit and the views kept pouring in for the rest of the day.

Platform Support

We currently only have builds for x86, s390x and ppc64le Linux but we plan to add Windows, macOS and many more as soon as the OpenJ9 team is ready. The easiest way to download them is at adoptopenjdk.net.

To read more about the advantages of using OpenJ9 over Hotspot read the OpenJ9 FAQ here.

New contribution of test cases to AdoptOpenJDK

We have contributed additional tests and a test framework the tests depend on, to the AdoptOpenJDK project in these repositories: openjdk-systemtest and stf.

The tests are longer running tests which cannot be automated using standard unit test frameworks (such as JUnit or TestNG). They fall under the broad category of ‘system tests’ – tests which attempt to simulate running production workloads and specific user scenarios.

The tests are mostly load tests which run a collection of java methods (typically discrete test case methods) for either a set number of invocations, or a period of time, using one or more threads. Although the tests can (and do) find functional issues executing the individual methods in the load, that is not the main goal of the testing. Running a workload for a period of time is often the most effective way to identify defects in the java virtual machine such as the garbage collector and the dynamic java compiler.  See the load test tool documentation for more details of these tests.

Other tests are more multi-process, multi-step in nature. For example, tests which use the Java Debugging Interface (JDI) to examine a test program running in a second JVM, and tests which perform remote operations on a second JVM running a workload, such as attaching a Java transformer agent.  See here for more details of these tests.

You can download and execute the tests locally – follow the instructions at openjdk-systemtest. You will also find additional documentation about the tests and the test tooling in the repositories.

 

We’re off to a great start

AdoptOpenJDK has certainly come a long way over the last few months!

We have a clean, bright website to distribute binaries of OpenJDK, with exciting plans for how it can be improved in the future.

Behind the website “shop front” there is a large continuous integration build and test farm, covering multiple operating system and hardware combinations.  The farm is put to good use compiling the OpenJDK code and running it through a suite of tests before publishing it.

All of our code is out there in Github for you to study, so you know exactly what those binaries contain and how they were built.  We believe in open build and open testing of the open source code!

We started with OpenJDK version 8 as the latest stable code stream.  Now that the OpenJDK project is close to declaring the OpenJDK version 9 final, we have started building and testing that too, and expect to have tested binaries available from the AdoptOpenJDK website and via our API simultaneously.

We are also happy to see the proposal for Eclipse OpenJ9 as another main stream open source Java Virtual Machine.  Once that code is available we will take a look with a view to building and testing OpenJDK with Eclipse OpenJ9 binaries too.

As an open build, test and distribution project we aim to be the “go to” location for high quality OpenJDK-based runtimes; and we are working hard to earn that reputation.  If you are maintaining an OpenJDK derived runtime, drop us a note.

There are many interesting and challenging tasks ahead.  Everyone is welcome to participate at whatever level suits you best.  Take a look at some of the work we know we need to do, or join us on Slack to talk about your new ideas.

We are grateful to the sponsors who recognize the value of this project and have generously provided services and resources to make it successful.

The next few months are going to be equally exciting!  Join in.