[jira] [Created] (HADOOP-18954) Filter NaN values from JMX json interface

["Bence Kosztolnik (Jira)" <ji...@apache.org>]

Bence Kosztolnik created HADOOP-18954:
-----------------------------------------

             Summary: Filter NaN values from JMX json interface
                 Key: HADOOP-18954
                 URL: https://issues.apache.org/jira/browse/HADOOP-18954
             Project: Hadoop Common
          Issue Type: Improvement
          Components: common
            Reporter: Bence Kosztolnik


As we can see in this [Yarn documentation|https://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html] beans can represent Float values as NaN. These values will be represented in the response JSON like:
{noformat}
...
"GuaranteedCapacity": NaN,
...
{noformat}

Based on the [JSON doc|https://www.json.org/] NaN is not a valid JSON token ( however some of the parser libs can handle it ), so not every consumer can parse values like this.

To be able to parse NaN values, a new feature flag should be created.
The new feature will replace the NaN values with null values.



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