Github user srowen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/10585#discussion_r48828840
  
    --- Diff: core/src/main/scala/org/apache/spark/scheduler/StageInfo.scala ---
    @@ -61,6 +61,21 @@ class StageInfo(
           "running"
         }
       }
    +
    +  private[spark] def getStatusDetail: String = {
    --- End diff --
    
    Is this used elsewhere or can it just go into `SparkListener`?
    
    I think this is confusing as one big format string. I'd make `val`s for the 
pieces that need some computation and return one big interpolated string. Also 
this is verbose:
    
    ```
    foo match {
      Some(x) => f(x)
      case _ => ""
    }
    ```
    compared to just `foo.map(x => f(x)).getOrElse("")`


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