tool to kill runaway queries

We already have a good mechanism for killing idle queries.
In some situations it would be nice to have a tool that kills active queries based on configurable rules, e.g. runtime or memory consumed goes over a limit.

A first approach could be a script using CM API calls impalaQueries and impalaQueries/cancel.

It would be nice though if the user who originally started the query would see a custom error message that describes why and who killed the query. This should also be stored in the profile.