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https://issues.apache.org/jira/browse/FLINK-9789?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chesnay Schepler resolved FLINK-9789.
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Resolution: Fixed
1.5: a0a810720d251fb9ab6a4cf9d995828d99a3f2c8
> Watermark metrics for an operator&task shadow each other
> --------------------------------------------------------
>
> Key: FLINK-9789
> URL: https://issues.apache.org/jira/browse/FLINK-9789
> Project: Flink
> Issue Type: Bug
> Components: Metrics
> Affects Versions: 1.5.0, 1.6.0
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.5.1, 1.6.0
>
>
> In FLINK-4812 we reworked the watermark metrics to be exposed for each
> operator.
> In FLINK-9467 we made further modifications to also expose these metrics
> again for tasks.
> In both JIRAs we register a single metric multiple times, for example the
> input watermark metric is registered for both the first operator in the task,
> and the task itself.
> Unfortunately, the metric system assumes metric objects to be unique, as can
> be seen in virtually all reporter implementations as well as the
> MetricQueryService.
> As a result the watermark metrics override each other in the reporter,
> causing only one to be reported, whichever was registered last.
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