Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/1218#discussion_r16201318
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala ---
@@ -45,8 +47,13 @@ private[history] class FsHistoryProvider(conf:
SparkConf) extends ApplicationHis
// A timestamp of when the disk was last accessed to check for log
updates
private var lastLogCheckTimeMs = -1L
+ // The modification time of the newest log detected during the last
scan. This is used
+ // to ignore logs that are older during subsequent scans, to avoid
processing data that
+ // is already known.
+ private var mostRecentLogModTime = -1L
+
// List of applications, in order from newest to oldest.
- @volatile private var appList: Seq[ApplicationHistoryInfo] = Nil
+ @volatile private var appList: mutable.Map[String,
FsApplicationHistoryInfo] = mutable.Map()
--- End diff --
not an `appList` anymore, and the comment above is out of date
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