[GitHub] [flink] NicoK opened a new pull request #8884: [FLINK-12981][metrics] ignore NaNs in percentile implementation

[GitBox <gi...@apache.org>]

NicoK opened a new pull request #8884: [FLINK-12981][metrics] ignore NaNs in percentile implementation
URL: https://github.com/apache/flink/pull/8884
 
 
   ## What is the purpose of the change
   
   Histogram metrics report `long` values and therefore, there is no `Double.NaN` in `DescriptiveStatistics`' data and there is no need to cleanse it while working with it.
   
   Please note that this PR is based on #8877.
   
   ## Brief change log
   
   - set a percentile implementation with ' NaNStrategy.FIXED' 
   
   ## Verifying this change
   
   This change is already covered by existing tests, such as derivatives of `AbstractHistogramTest`.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): **no**
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: **no**
     - The serializers: **no**
     - The runtime per-record code paths (performance sensitive): **no**
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: **no**
     - The S3 file system connector: **no**
   
   ## Documentation
   
     - Does this pull request introduce a new feature? **no**
     - If yes, how is the feature documented? **JavaDocs**
   

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