> On Sep 11, 2018, at 6:14 PM, Till Toenshoff <toensh...@me.com> wrote:
> 
> Hey All,
> 
> We are considering bundling/vendoring libevent 2.0.22 with upcoming releases 
> of Mesos.
> 
> Let me explain the motivation and then go into some details.
> 
> Due to https://issues.apache.org/jira/browse/MESOS-7076, SSL builds Mesos 
> stopped functioning on distributions that offer libevent 2.1.8 by default. 
> Specifically the failure was observed on Ubuntu 17/18 as well as on macOS. It 
> has also just come to my attention that Fedora 18 shares the same fate.

F28

> So the problem is less likely OS specific but more likely libevent + SSL + 
> libprocess specific.
> Instead of getting stuck in the rabbit hole of debugging right away, I 
> decided that bundling a known good version of libevent was the most reliable 
> way to prevent sad faces when building Mesos with SS but instead we can be 
> sure SSL builds of Mesos function properly across all supported platforms, 
> out of the box.
> 
> Details on the bundling;
> We will include libevent 2.0.22 and we also include a patch that makes that 
> version build against both openssl 1.0.x as well as 1.1.x. For unbundled 
> builds (--with-libevent) I have some additional checks foreseen that try to 
> prevent a build of a known bad variant of libevent + SSL + Mesos.
> 
> The bundling and those checks are a workaround, not a solution. I still am 
> pursueing debugging the underlying cause. However, way too much time has 
> passed already without a proper solution, hence this suggestion of a quick 
> fix, bundling workaround.
> 
> Let me know your thoughts!

I think this is OK as long as we have a reasonable expectation that we can 
unbundle soon-ish.

J

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