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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