Hello friends! I work on the JRuby project, and have recently (a couple times in the past year) attempted to get Discourse running. It would mean you can run a single Discourse process for a whole site, and probably use less memory and CPU at the same time. I think it’s worth getting it to run. As…

Here’s the diff I have at the moment. This is not an exhaustive list of extensions with no JRuby support but it’s most of them. https://gist.github.com/headius/99f7a177b67d635d4783e7f7b164a3c9 Some replacements I know of: fast_xor has been superceded by xorcis…

[image] headius: Presumably unicorn can just be replaced with puma. Both are in the Gemfile. Yes this is totally safe, puma is supported. If we really want to conserve memory here though it may be interesting to run sidekiq inside puma. [image] headius: fast_blank (transitive dependency …

[image] sam: Oh, we should bench this if perf is the same we can move to xorcist The fast_xor README actually says to use xorcist. I believe the code was simply moved there and expanded to support JRuby. Here’s the complete list of exts with status as I know it today. bootsnap: JRuby suppo…

@sam any of the easy / obvious replacements we should do next week just to get more obstacles out of the way of this happening.

I just did this. https://github.com/discourse/discourse/commit/79e0cd7f529c14d482b2c5dc1394bc90d6070d56 and https://github.com/discourse/discourse/commit/b301c9f6c12f517ee64e15599d7cac6ed2b9d7d8 and https://github.com/discourse/discourse/commit/c234a14f0de458168adb5100cb7fd9d21a362d7d This lea…

[image] sam: Regarding Rhino, you got to make sure the ruby rhino with latest GitHub - mozilla/rhino: Rhino is an open-source implementation of JavaScript written entirely in Java It looks pretty silent there Commits · cowboyd/therubyrhino · GitHub . Ideally I would prefer v8, but at a minimum w…

[image] sam: We really want to work with JRuby Aside: can y’all share with those of us on the sidelines a little bit about why? Is the notion that JRuby would replace MRI as the default implementation for Discourse in the future if you get this working?

That certainly isn’t my goal! JRuby would always be an alternative, and in some cases it may be a better choice than MRI for larger deployments. A single JRuby instance can handle an entire server load, maxing out all cores. If you are getting to the point of running 3 or 4 or 5 MRI instances, there…

Getting Discourse running on JRuby

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sam (Sam Saffron) February 23, 2018, 12:23am 2

Yes absolutely.

We really want to work with JRuby, what are the current stumbling blocks?

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Getting Discourse running on JRuby

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