David Crossley wrote:
> You will see from the svn commits to our zone infrastructure
> that i have determined that the reasons for all these sporadic
> failures are because our hourly update of Forrest is sometimes
> taking an extraordinary long time. Therefore it interrupts
> forrestbot jobs that happen later in the hour.
> 
> It doesn't happen every hour and i cannot yet see a pattern.
> I need to gather info and talk to ASF infrastructure.

I will wait for a while, as ASF Infra is attending to some
other issues on the zone server which might be affecting this.

Added FOR-1061 to remind us.

In the meantime, i have rearranged our forrestbot cron jobs
to happen every 2 hours to avoid conflicts.

-David