This issue is exposed from
MESOS-6400(https://issues.apache.org/jira/browse/MESOS-6400). When a user is trying to tear down an 'unregistered_framework' from the 'master/teardown' endpoint, a bad request will be returned: `No framework found with specified ID`.
Ideally, we should support tearing down an unregistered framework, since those frameworks may occur due to network partition, then all the orphan tasks still occupy the resources. It would be a nightmare if a user has to wait until the unregistered framework to get those resources back.
This may be the initial implementation: https://github.com/apache/mesos/commit/bb8375975e92ee722befb478ddc3b2541d1ccaa9