[jira] [Created] (MESOS-5301) Add synchronous validation for all types of Calls.

["Anand Mazumdar (JIRA)" <ji...@apache.org>]

Anand Mazumdar created MESOS-5301:
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             Summary: Add synchronous validation for all types of Calls.
                 Key: MESOS-5301
                 URL: https://issues.apache.org/jira/browse/MESOS-5301
             Project: Mesos
          Issue Type: Improvement
            Reporter: Anand Mazumdar


Currently, we do a best effort validation for all calls sent to the master from the scheduler by invoking {{validation::scheduler::call::validate(call, principal)}}. This is a generic validation helper for all calls. However, for more coarse grained validation for a particular call, we invoke the validation as part of the call handle itself.

{code}
Option<Error> validationError = roles::validate(frameworkInfo.role());
{code}

This in turn makes all validations asynchronous i.e. the framework gets them as {{Event::ERROR}} events later. It would be good if such validations can be handled while processing the {{Call}} message itself synchronously.



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