Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9571#discussion_r111830700
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/ApplicationHistoryProvider.scala
---
@@ -99,6 +104,19 @@ private[history] abstract class
ApplicationHistoryProvider {
}
/**
+ * Bind to the History Server: threads should be started here;
exceptions may be raised
+ * Start the provider: threads should be started here; exceptions may be
raised
+ * if the history provider cannot be started.
+ * The base implementation contains a re-entrancy check and should
--- End diff --
This makes this interface awkward. Why can't the `HistoryServer` keep track
of that?
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