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Prakhar Jain 6898be9f02 [SPARK-29681][WEBUI] Support column sorting in Environment tab 
### 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.

![Annotation 2019-11-22 154058](https://user-images.githubusercontent.com/2551496/69417432-a8d6bc00-0d3e-11ea-865b-f8017976c6f4.png)
![Annotation 2019-11-22 153600](https://user-images.githubusercontent.com/2551496/69417433-a8d6bc00-0d3e-11ea-9a75-8e1f4d66107e.png)
![Annotation 2019-11-22 153841](https://user-images.githubusercontent.com/2551496/69417435-a96f5280-0d3e-11ea-85f6-9f61b015e161.png)

Closes #26638 from prakharjain09/SPARK-29681-SPARK-UI-SORT.

Authored-by: Prakhar Jain <prakjai@microsoft.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2019-11-23 18:09:02 -08:00
..
benchmarks [SPARK-29576][CORE] Use Spark's CompressionCodec for Ser/Deser of MapOutputStatus 2019-10-23 18:17:37 -07:00
src [SPARK-29681][WEBUI] Support column sorting in Environment tab 2019-11-23 18:09:02 -08:00
pom.xml [SPARK-29674][CORE] Update dropwizard metrics to 4.1.x for JDK 9+ 2019-11-03 15:13:06 -08:00