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https://issues.apache.org/jira/browse/FLINK-3787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Maier reassigned FLINK-3787:
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Assignee: Roman Maier
> Yarn client does not report unfulfillable container constraints
> ---------------------------------------------------------------
>
> Key: FLINK-3787
> URL: https://issues.apache.org/jira/browse/FLINK-3787
> Project: Flink
> Issue Type: Improvement
> Components: YARN Client
> Affects Versions: 1.1.0
> Reporter: Till Rohrmann
> Assignee: Roman Maier
> Priority: Minor
>
> If the number of virtual cores for a Yarn container is not fulfillable, then
> the {{TaskManager}} won't be started. This is only reported in the logs but
> not in the {{FlinkYarnClient}}. Thus, the user will see a started
> {{JobManager}} with no connected {{TaskManagers}}. Since the log aggregation
> is only available after the Yarn job has been stopped, there is no easy way
> for the user to detect what's going on.
> This problem is aggravated by the fact that the number of virtual cores is
> coupled to the number of slots if no explicit value has been set for the
> virtual cores. Therefore, it might happen that the Yarn deployment fails
> because of the virtual cores even though the user has never set a value for
> them (the user might even not know about the virtual cores).
> I think it would be good to check if the virtual cores constraint is
> fulfillable. If not, then the user should receive a clear message that the
> Flink cluster cannot be deployed (similar to the memory constraints).
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