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https://issues.apache.org/jira/browse/FLINK-21000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17266679#comment-17266679
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Steven Zhen Wu commented on FLINK-21000:
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I tried to trace the code up the chain:
[https://github.com/stevenzwu/flink/commit/fb29be664b24c7b1ac13ca98393e77b0a8213888]
But I got stuck in the `StreamExecutionEnvironment#getStreamGraphGenerator()`.
I am not sure how can `StreamExecutionEnvironment` get the `MetricGroup` or
`MetricRegistry`
> set MetricGroup in SourceCoordinatorContext
> -------------------------------------------
>
> Key: FLINK-21000
> URL: https://issues.apache.org/jira/browse/FLINK-21000
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Common
> Affects Versions: 1.12.0
> Reporter: Steven Zhen Wu
> Priority: Major
>
> Right now, SourceCoordinatorContext returns null. We need a valid metric
> group to publish source metrics (e.g. number of pending splits) in source
> enumerator.
> cc [~sewen] [~jqin]
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