> On Sep 11, 2018, at 6:14 PM, Till Toenshoff 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
