[Buildbot-devel] Forcing on a given buildslave

[Dustin J. Mitchell]

On Mon, Sep 3, 2012 at 1:14 PM, Jared Grubb <jared.grubb at gmail.com> wrote:
> I think it might be possible to swap whether the buildrequest or the slave
> gets chosen first.
>
> I've been looking at that chunk of code lately to solve another issue in
> that area. I have 3 buildslaves, and use slave-locks to make sure only one
> build happens per slave. The slave-assignment code doesnt check for locks
> before randomly picking a slave ... so I'll have cases where I have two
> slaves idle, and one or more builds assinged to the busy slave, all waiting
> on locks.

This code (the build request distributor) was recently rewritten.  It
has a pretty complicated job -- coordinating the availability of slave
builders and build requests, handling build request priorities,
nextSlave, nextBuild, and so on.  There are a few big things lacking:
the lock problem you describe above, and also the inability to
prioritize builds on a particular slave across multiple builders (for
slaves with limited concurrency).

I'd love to see this improved!

Dustin