Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/10154#discussion_r46759338
--- Diff: core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala
---
@@ -117,6 +119,28 @@ private[ui] class ExecutorsPage(
val maximumMemory = info.maxMemory
val memoryUsed = info.memoryUsed
val diskUsed = info.diskUsed
+
+ // Determine Color Opacity from 0.5-1
+ var activeTasksAlpha = 1.0
+ var failedTasksAlpha = 1.0
+ var completedTasksAlpha = 1.0
+ var totalDurationAlpha = 1.0
+ if (info.totalCores > 0) {
+ // activeTasks range from 0 to all cores
+ activeTasksAlpha = (info.activeTasks.toDouble / info.totalCores) *
0.5 + 0.5
+ }
+ if (info.totalTasks > 0) {
--- End diff --
You can also assign these like
```
val (failedTasksAlpha, completedTasksAlpha) =
if (...) {
(..., ...)
} else {
(1.0, 1.0)
}
```
but whether that's clearer is a matter of taste.
It might be better to cap alpha at 1.0 just for tidiness.
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