Ngone51 commented on pull request #31369:
URL: https://github.com/apache/spark/pull/31369#issuecomment-774929505
Hopefully, callers in the future could be always aware that
`StateStoreMetrics` is combined by `StateStoreCustomMetric` rather than
`StateStoreCustomMetric.name`. Otherwise, usages like
```scala
combinedMetrics.customMetrics.foreach { case (metric, value) =>
longMetric(metric.name) = value
^ "=" instead of "+="
}
```
could result in the wrong metrics again.
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