[jira] [Resolved] (REEF-1951) Make DriverStatus more robust

["Sergiy Matusevych (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/REEF-1951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergiy Matusevych resolved REEF-1951.
-------------------------------------
    Resolution: Fixed

Implemented in PR [#1413|https://github.com/apache/reef/pull/1413]

> Make DriverStatus more robust
> -----------------------------
>
>                 Key: REEF-1951
>                 URL: https://issues.apache.org/jira/browse/REEF-1951
>             Project: REEF
>          Issue Type: Bug
>          Components: REEF Bridge
>            Reporter: Markus Weimer
>            Assignee: Markus Weimer
>
> [REEF-1942] introduces a new HTTP handler to communicate the Driver status to the client. However, as the tests for [REEF-1950] in [#1412|https://github.com/apache/reef/pull/1412] show, this mechanism isn't robust in two ways:
> # The Client could call the HTTP endpoint for the first time _before_ it starts. This results in a failed connection. To remedy this, the Client needs to retry the connection.
> # The Client could call the HTTP endpoint for the first time _after_ the Driver shuts down. This results in a failure. To remedy this, the Driver's HTTP handler should ensure that it is called at least once, e.g. by scheduling checks on the {{Clock}}.



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