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The source code for Corretto is available via GitHub, and InfoQ reached out to Gupta to ask if the project would be open to pull requests and patches from the wider community. Audience members at Devoxx asked about the possibility of support for other JVMs in future versions of the platform, but Galatzer stated that at this time only HotSpot will be bundled with Corretto. However, this does assume execution of an application via the HotSpot JVM, and if an alternative JVM is being currently being used, for example Eclipse OpenJ9, then the command line options that are available via this JVM may be incompatible or require modification. Once Corretto binaries are installed on a host and correctly invoked to run Java applications, the "existing command-line options, tuning parameters, monitoring, and anything else in place will continue to work as before". If an issue is solved a different way in OpenJDK, we will move to that solution as soon as it is safe to do so. In the case that any upstreaming efforts for such patches is not successful, delayed, or not appropriate for OpenJDK project, we will provide them to our customers for as long as they add value. He continues, "we downstream fixes made in OpenJDK, add enhancements based on our own experience and needs, and then produce Corretto builds." This does, however, raise the possibility for potential subtle differences within the upstream OpenJDK repo and Corretto. Example of these patches include: Prevent premature OutOfMemoryException when G1 GC invocation is suspended by a long-running native call Back port from OpenJDK 10, fixing JDK-8177809: "File.lastModified() is losing milliseconds (always ends in 000)" and Improve portability of JVM source code when using gcc7.Īmazon has already made several recent contributions to OpenJDK, and Gupta's blog post states that "we look forward to working closely with the OpenJDK community on future enhancements to OpenJDK 8 and 11". The additional patches and improvements that are included within the Corretto build which are outside of the current OpenJDK upstream code base enable Amazon to "address high-scale, real-world service concerns, meeting heavy performance and scalability demands". Amazon also runs the Java Technology Compatibility Kit (TCK) on each Corretto release to ensure compatibility with the Java SE platform. The release process includes testing on thousands of Amazon production services, which makes it possible for fixes to be released within days of finding issues.
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The pair discussed that Corretto 8 includes targeted backports from newer OpenJDK releases, as well as newly-developed enhancements from the associated community and Amazon itself. Initially Amazon re-affirmed LTS for Java in Amazon Linux, and this has now been followed up with the preview release of Amazon Corretto.Īt an additional breakout session at Devoxx BE, Gupta was joined by Yishai Galatzer, manager for the JDK team at AWS.
WHERE IS THE AMAZON CORRETTO JDK ON MAC FREE
AWS will also provide urgent fixes to customers outside of the quarterly schedule.Īfter the recent announcements of changes to Oracle's Java support offering - principally removing free long term support (LTS) for Java - many Amazon customers have become concerned that they would have to pay for an LTS version of Java in order to run their workloads. We're making available to customers with no-cost, long-term support, with quarterly updates including bug fixes and security patches. The announcement post on the AWS Open Source blog by Arun Gupta, principal open source technologist at Amazon Web Services, stated that Java is one of the most popular languages in use by AWS customers, and that Amazon is committed to supporting Java and keeping it free. Amazon will support Corretto 11 with quarterly updates until at least August 2024. Corretto 11, corresponding to OpenJDK 11, will be available during the first half of 2019. Amazon will provide free security updates for Corretto 8 until at least June 2023. The GA release is planned for the first quarter of 2019, and will also add support for Ubuntu and Red Hat Enterprise Linux. The preview release version of Corretto 8 corresponds to Java 8, and installation binaries are currently available for Amazon Linux, macOS, and Windows. Amazon plans for Corretto to become the default OpenJDK on Amazon Linux 2 in 2019. During the opening keynote James Gosling, the founder of the Java language, announced Corretto as a drop-in replacement for all Java SE distributions, with the exception of use cases involving features that are not available in OpenJDK (e.g., Java Flight Recorder) or workloads currently being run on non-HotSpot JVMs. At Devoxx BE, held in Antwerp, Belgium, Amazon announced a preview release of Amazon Corretto, a "no-cost, multiplatform, production-ready distribution" build of OpenJDK, the reference implementation of Java.