prakharjain09 opened a new pull request #26638: [SPARK-29681][WebUI] Fix Column sorting in Environment tab in SparkUI URL: https://github.com/apache/spark/pull/26638 ### What changes were proposed in this pull request? Add extra classnames to table headers in EnvironmentPage tables in Spark UI. ### Why are the changes needed? SparkUI uses sorttable.js to provide the sort functionality in different tables. This library tries to guess the datatype of each column during initialization phase - numeric/alphanumeric etc and uses it to sort the columns whenever user clicks on a column. That way it guesses incorrect data type for environment tab. sorttable.js has way to hint the datatype of table columns explicitly. This is done by passing custom HTML class attribute. ### Does this PR introduce any user-facing change? No ### How was this patch tested? Manually tested sorting in tables in Environment tab in Spark UI.   
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