[jira] [Resolved] (REEF-1648) Allow transition from ALLOCATED to RUNNING in EvaluatorState

["Markus Weimer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/REEF-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Weimer resolved REEF-1648.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.16

Resolved via [#1164|https://github.com/apache/reef/pull/1164]

> Allow transition from ALLOCATED to RUNNING in EvaluatorState
> ------------------------------------------------------------
>
>                 Key: REEF-1648
>                 URL: https://issues.apache.org/jira/browse/REEF-1648
>             Project: REEF
>          Issue Type: Bug
>          Components: REEF-Common
>            Reporter: Mariia Mykhailova
>            Assignee: Mariia Mykhailova
>            Priority: Critical
>             Fix For: 0.16
>
>
> In REEF-62 we introduced state transition checks, which were refactored several times. However, these checks don't cover all allowed scenarios. In driver restart scenario restarted driver initially has all evaluators in `ALLOCATED` state, and when evaluators from first run reconnect to driver, they report they are in `RUNNING` state, so driver refuses to recognize them. 
> We need to allow this transition for the restarted driver to recognize reconnecting evaluators.



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