[jira] [Created] (MESOS-3485) Make hook execution order deterministic

["Felix Abecassis (JIRA)" <ji...@apache.org>]

Felix Abecassis created MESOS-3485:
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             Summary: Make hook execution order deterministic
                 Key: MESOS-3485
                 URL: https://issues.apache.org/jira/browse/MESOS-3485
             Project: Mesos
          Issue Type: Improvement
          Components: modules
            Reporter: Felix Abecassis


Currently, when using multiple hooks of the same type, the execution order is implementation-defined. 

This is because in src/hook/manager.cpp, the list of available hooks is stored in a {{hashmap<string, Hook*>}}. A hashmap is probably unnecessary for this task since the number of hooks should remain reasonable. A data structure preserving ordering should be used instead to allow the user to predict the execution order of the hooks. I suggest that the execution order should be the order in which hooks are specified with {{--hooks}} when starting an agent/master.

This will be useful when combining multiple hooks after MESOS-3366 is done.



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