Github user markhamstra commented on a diff in the pull request:
https://github.com/apache/spark/pull/15441#discussion_r82924909
--- Diff: core/src/main/scala/org/apache/spark/ui/jobs/JobsTab.scala ---
@@ -35,4 +37,18 @@ private[ui] class JobsTab(parent: SparkUI) extends
SparkUITab(parent, "jobs") {
attachPage(new AllJobsPage(this))
attachPage(new JobPage(this))
+
+ def handleKillRequest(request: HttpServletRequest): Unit = {
+ if (killEnabled &&
(parent.securityManager.checkModifyPermissions(request.getRemoteUser))) {
+ val killFlag =
Option(request.getParameter("terminate")).getOrElse("false").toBoolean
+ val jobId = Option(request.getParameter("id")).getOrElse("-1").toInt
+ if (jobId >= 0 && killFlag &&
jobProgresslistener.activeJobs.contains(jobId)) {
+ sc.get.cancelJob(jobId)
+ }
--- End diff --
Similarly, there is no need for `sc.get`. In fact, that's a bug if
`parent.sc` really should be an `Option` and thus could be `None`.
```scala
sc.foreach(_.cancelJob(id))
```
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