Zhu Zhu created FLINK-15169:
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Summary: 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
Fix For: 1.10.0
WebUI relies on {{ExecutionGraph#failureInfo}} and {{Execution#failureCause}}
to generate error info (vis {{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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