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From "Meng Zhu (JIRA)" <>
Subject [jira] [Created] (MESOS-8878) Safeguard downgrade with minimum capabilities.
Date Fri, 04 May 2018 00:33:00 GMT
Meng Zhu created MESOS-8878:

             Summary: Safeguard downgrade with minimum capabilities.
                 Key: MESOS-8878
             Project: Mesos
          Issue Type: Epic
            Reporter: Meng Zhu

A common use case for downgrade is rolling back from problematic upgrades. Mesos promises
compatibility between any 1.x and 1.y versions of masters/agents as long as new feature(s)
is not used. However, currently there is no easy way to tell whether any “new” features
(that would break downgrade) are used. And any incompatible downgrade would silently result
in undefined behavior instead of failsafe. This is not ideal.

We propose to introduce minimum capability---the minimum capability a component needs to possess
in order to recover from the certain state.

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