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https://issues.apache.org/jira/browse/FLINK-4772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chesnay Schepler closed FLINK-4772.
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Resolution: Fixed
Implemented in e30e7a6192d921d7a3c94beb178eb2c7b9ba74c0
> Store metrics in MetricStore as strings
> ---------------------------------------
>
> Key: FLINK-4772
> URL: https://issues.apache.org/jira/browse/FLINK-4772
> Project: Flink
> Issue Type: Improvement
> Components: Metrics, Webfrontend
> Affects Versions: 1.1.2
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Fix For: 1.2.0
>
>
> The MetricStore is a nested structure which stores metrics in several
> Map<String, Object> objects. The key is the name of the metric, while the
> value is the value of the metric. Since gauges are transmitted as Strings,
> and all other metric types are of numeric nature, the type of the value is
> limited to Strings and Numbers.
> Storing them with different types however has no benefit, and makes working
> with the MetricStore needlessly complicated since one is forced to cast every
> retrieved metric. This also implies that one either has to know what kind of
> metric you're dealing with (which can easily go wrong), or check the type
> before using the metric, which is cumbersome.
> As such i propose storing all metrics as strings.
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