[jira] [Assigned] (FLINK-15169) Errors happen in the scheduling of DefaultScheduler is not shown in WebUI

["Gary Yao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-15169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary Yao reassigned FLINK-15169:
--------------------------------

    Assignee: Zhu Zhu  (was: Gary Yao)

> Errors happen in the scheduling of DefaultScheduler is not shown in WebUI
> -------------------------------------------------------------------------
>
>                 Key: FLINK-15169
>                 URL: https://issues.apache.org/jira/browse/FLINK-15169
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Coordination
>    Affects Versions: 1.10.0
>            Reporter: Zhu Zhu
>            Assignee: Zhu Zhu
>            Priority: Blocker
>             Fix For: 1.10.0
>
>
> WebUI relies on {{ExecutionGraph#failureInfo}} and {{Execution#failureCause}} to generate error info (via {{JobExceptionsHandler#createJobExceptionsInfo}}). 
> Errors happen in the scheduling of DefaultScheduler are not recorded into those fields, thus cannot be shown to users in WebUI (nor via REST queries).
> To solve it, 
> 1. global failures should be recorded into {{ExecutionGraph#failureInfo}}, via {{ExecutionGraph#initFailureCause}} which can be exposed as {{SchedulerBase#initFailureCause}}.
> 2. for task failures, one solution I can think of is to avoid invoking {{DefaultScheduler#handleTaskFailure}} directly on scheduler's internal failures. Instead, we can introduce {{ExecutionVertexOperations#fail(ExecutionVertex)}} to hand the error to {{ExecutionVertex}} as a common failure.
> cc [~gjy]



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