Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10284#discussion_r47560365
--- Diff: core/src/main/scala/org/apache/spark/deploy/master/Master.scala
---
@@ -924,49 +939,74 @@ private[deploy] class Master(
* Return the UI if successful, else None
*/
private[master] def rebuildSparkUI(app: ApplicationInfo):
Option[SparkUI] = {
+ val futureUI = asyncRebuildSparkUI(app)
+
+ // Wait until the UI is rebuilt or cancelled, log status occasionally
for apps with many events
+ var waitSec = 2
+ do {
+ try {
+ val ui = Await.result(futureUI, Duration(waitSec,
TimeUnit.SECONDS))
+ return Some(ui)
+ } catch {
+ case te: TimeoutException =>
+ waitSec *= 2
+ logInfo(s"Application UI is rebuilding, will continue to wait
$waitSec seconds")
+ case NonFatal(_) | _: InterruptedException =>
+ waitSec = 0
+ }
+ } while (waitSec > 0)
--- End diff --
This feature could be useful, but it's technically not SPARK-12062 and only
used in the REST API now. Especially since we plan to remove rebuilding this on
the Master altogether in Spark 2.0 I'd just await on the future for simplicity.
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