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This document is primarily for developers of the June 2018 Photon Simultaneous Release.

Eclipse Equinox 4.8.0 (Photon) The Equinox 4.8 release continues to focus on implementing the latest Core OSGi specification and selected OSGi Compendium and Enterprise services. The OSGi R7 Core specification is currently under development and is planned be final before the Equinox 4.8 release. Jun 27, 2018 Eclipse Photon delivers what you need to rapidly innovate. PyDev is a plugin that enables Eclipse to be used as a Python IDE (supporting also Jython and IronPython). It uses advanced type inference techniques which allow it to provide things such as code completion and code analysis, besides providing a debugger, interactive console, refactoring, tokens browser, django integration, etc. We talked to Mickael Istria, ‎Eclipse developer at the ‎Eclipse Foundation about the projects he spent his efforts on in Eclipse Oxygen, what’s coming to Photon, the projects that fascinate him and the future of the “classic IDE”.

  • 2Milestones and Release Candidates
  • 3Communication Channels
    • 3.2Mailing Lists and Newsgroups
  • 4Builds and P2 repository
  • 5Update Releases

Requirements For Participation

Projects that are part of Photon agree to abide by the requirements of the Eclipse yearly Simultaneous Release.

Milestones and Release Candidates

The Release is always on the fourth Wednesday of June. The milestone dates are at roughly 6-week intervals. Any end-of-cycle release candidate (RC) dates are typically one week apart. Each project has their deliveries due at times offset from the end-date so that the project dependencies can come together in a reasonable order. These delivery times are based on the dependencies between projects. They are labeled +0, +1, +2, and +3, with +0 coming first (the Platform) and '+4' coming last (only EPP packages). Projects themselves decide if they are +0, +1, +2, or +3. The actual time-offset represented by these intervals change over the course of the year of development, being several days at first, but then only one day near the end of the release. The following calendar is the official schedule of the overall Photon Release. Projects are free to have their own schedules as long as they meet the Photon deliverables.

Note that projects choose their own +n category based on major or primary dependencies. There are many cases where a project might have to deliver pieces of their code a little earlier, if some project depends on it, or a little later if they have a stray dependency. These sorts of deviations are left to the projects to work out, pair-wise, among themselves. Feel free to bring up complicated cases for discussion.

Given all these constraints, the exact dates for any particular year are pretty predictable. The following table summarizes the most significant Photon dates but see the subsequent calendar for the important details. That is, your stuff is due earlier than these table dates! Projects need to deliver a week or two before these 'end dates', depending on their chosen, committed offset category (+0, +1, etc). Also, to emphasize, the dates represent the last possible date to contribute .. projects are encourage to provide 'warm-up' builds a week or two earlier, when possible, as this often helps expose issues that other teams need discussion or that other teams need to react to, before their final delivery.

After RC4 is quiet week. There will be no further builds. That time is reserved for final, in depth testing, and preparation for release. Emergency rebuilds might be considered, by following the usual Planning Council Exception Process, but only for serious, blocking regressions that have a 'cross-project' impact.

Note: A rebuild during the quiet, final week before a release implies an automatic slip of one week for the official, simultaneous release date. This applies to all projects that are part of the simultaneous release, since, to name one reason, there is always a chance we'd have to re-spin again, and slip the date a second time. All projects consuming a 're-built' bundle, might also have to rebuild or re-package their deliverables.


Release Date Span Notes
Photon M1Friday, August 11, 201708/04 to 08/116 weeks from Oxygen GA
Photon M2Friday, September 22, 201709/15 to 09/226 weeks from M1
Oxygen.1Wednesday, September 27, 2017
Oxygen.1aWednesday, October 11, 2017
Photon M3Friday, November 03, 201710/27 to 11/036 weeks from M2
Photon M4Friday, December 15, 201712/08 to 12/156 weeks from M3
Oxygen.2Wednesday, December 20, 2017
Photon M5Friday, February 02, 201801/26 to 02/027 weeks from M4, extra weeks for end of year holidays
Photon M6Friday, March 16, 201803/09 to 03/166 weeks from M5
Oxygen.3Wednesday, March 21, 2018
Oxygen.3aWednesday, April 11, 2018
Photon M7Friday, May 18, 201805/11 to 05/188 weeks from M6
Photon RC1Friday, May 25, 201805/18 to 05/251 week from M7
Photon RC2Friday, June 01, 201805/25 to 06/011 week from RC1
Photon RC3Friday, June 08, 201806/01 to 06/081 week from RC2
Photon RC4Friday, June 15, 201806/08 to 06/151 week from RC3
Quiet week06/18 to 06/26No builds during 'quiet week'. It is assumed all code is done by the end of RC4.
Photon GAWednesday, June 27, 20182 weeks from RC4

The calendar is available in the following formats:ICal,HTML

Communication Channels

Cross-Project Milestone & RC Status Reporting

Only negative status needs to be reported. It is essential for many aspect of the simultaneous release that communication be prompt and clear, on many topics. One of the most important ones, is if someone is not meeting some date or delivery. Put another way, we assume everyone is on target and has delivered their stuff unless a note is sent to cross-project list that you are delayed. Its better to be up front about it, so everyone knows what to expect, rather than to hope things turn out OK at the very last minute, since if you 'miss' without saying anything you are more likely to impact other people, and miss your chance to be part of the release.

Mailing Lists and Newsgroups

Eclipse projects have three communication channels: a mailing list for developers, a newsgroup for users, and Bugzilla. While Photon is not a 'project' per se, it will use the same structure:

Developer mailing list
  • cross-projects-issues-dev - mailing list for developers and releng (see archives). This is the list to use to discuss build issues, announce changes in plans, slippage in deliverables, etc.

If there is any doubt about where a bug belongs, it can always start in the 'Cross-Project' component. (Under Eclipse Foundation > Community). If it turns out to be a single project's responsibility, it can be moved to that project. If it is a true cross-project bug, where several projects need to act, then it can stay in the cross-project component.

  • Search in Eclipse Foundation > Community > Cross-Project
  • Open a new Cross-Project bug
The Planning Council Mailing List

Because there has been confusion in the past, we'll be explicit here that the planning council mailing list ( is for Planning Council business, not the Photon Release activities per se. While they sometimes overlap, there is no need to cross post. While anyone can request a subscription to the planning council list (for openness and transparency) the expectation is that only Planning Council members post to it.

Eclipse Ide Version Photon

Conference Calls

The Planning Council has regularly scheduled calls for Planning Council business. See conference calls.

But there are no planned calls for the release, per se, or for larger audiences, but they can be arranged if required or desired (for example, if needed for build coordination).

Builds and P2 repository

Builds (Aggregation)

This section, about assembling the repositories, is subject to change, as improvements in the process are made.

A number of utilities have been written to automate the assembly of the different simultaneous releases. These are available in their own SCM repository. If interested in this history, you can find more information about the history and organization by looking at some of the old, previous information on the Contributing to Helios Build, Galileo Build, Ganymede Build and Europa Build pages).

With Photon we are using the CBI Aggregator (effective 11/2016 we switched from 'b3' aggregator to 'CBI aggregator').

Eclipse (software) - Wikipedia

The Contributing to Simultaneous Build page is where you go to learn how to add your project to the Photon build (aggregation).

p2 Repository

To obtain the latest published bits from Photon, use this URL:

It contains the latest milestone, release candidate, eventually the release itself, and then eventually the update releases.

To obtain the latest working version, as we build up to a milestone or release, you can test the site at

Update Releases

After Photon.0, the simultaneous release cadence will move from a 1 year release cycle to a 13 weeks cycle.

The releases will occur at the end of September, December, March and June each year. Instead of a one year long ramp-up to a release, there will be rolling releases.

See: Simultaneous Release Cycle FAQ

Staging repository

We will have a named staging repository:

200 utc to est convert. *

* - Probably. See Planning Council mailing list for ongoing(?) debate.


See Schedule of next releases

Other considerations and rules

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Individual projects may have their own update releases at any time if they need to, but all participants in the Simultaneous Release, are expected to participate fully in each release. What new features are added or what bugs are fixed is up to each project to decide, but each project must, at least, continue to 'fit in'; build, install and avoid conflicts. To be explicit, new projects may join releases, and participating projects may add new features or APIs (i.e. contribute Minor Releases) if they would like to.Another important rule is that new projects and even new features must be essentially complete, including release review records, by RC1. Anything later than that must also go through the Planning Council's formal Exception Process.

Retrieved from ''

The Eclipse Foundation has announced the latest version of the Eclipse IDE. The Photon release is designed to expand on polyglot capabilities based on the Language Server Protocol plugins.

“The Language Server Protocol (LSP) ecosystem delivers editing support for popular and emerging programming languages. Combined with the move to a quarterly rolling release cadence, the LSP focus demonstrates a commitment to keeping pace with evolving developer and commercial needs,” the foundation wrote in an announcement about the release.

The foundation explained this is a milestone releases as it marks the 13th annual simultaneous release of Eclipse projects and includes 85 projects with more than 73 million lines of code, the foundation explained.

According to Eclipse Foundation, features include:

Eclipse Photon 64


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  • Support for building, debugging, running and packaging Rust apps
  • C# editing and debugging capabilities such as syntax coloring, autocomplete suggestions, code diagnostics and code navigation tools
  • Support for Java 10 and Java EE 8
  • Dark theme improvements.

“With new language adoption happening at a faster rate, LSP based plugins will take the Eclipse IDE’s proven extensibility to the next level,” said Mike Milinkovich, executive director of the Eclipse Foundation. “Congratulations to all of the committers, projects, and Foundation staff that made the Eclipse Photon simultaneous release possible.”

More details are available here.