if the upstream job is triggered by svn, the downstream job which is triggered by this upstream job will not get any svn info from the upstream job. So if the downstream job's build failed, we could't know who should be blamed. Although there is a plugin called BlameUpstreamJob can solve this problem, it only can send sample mail which can't be configured to who trigger the upstream job and can't be
used in chain of upstream-downstream jobs. I Insist on we need a SCM plugin that can collect svn info from upstram job to downstream job, then we could use email-ext plugin and other plugin to help us blame who trigger the svn to make build failed in downstream job.