Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/5187#discussion_r27156629
--- Diff: core/src/main/scala/org/apache/spark/ui/UIWorkloadGenerator.scala
---
@@ -99,12 +103,17 @@ private[spark] object UIWorkloadGenerator {
} catch {
case e: Exception =>
println("Job Failed: " + desc)
+ } finally {
+ barrier.release()
}
}
}.start
Thread.sleep(INTER_JOB_WAIT_MS)
}
}
+
+ // Waiting for threads.
+ barrier.acquire()
--- End diff --
why not just `join()` on all of those threads?
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