Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4214#discussion_r23649845
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala ---
@@ -53,8 +79,10 @@ private[history] class FsHistoryProvider(conf:
SparkConf) extends ApplicationHis
private val fs = Utils.getHadoopFileSystem(logDir,
SparkHadoopUtil.get.newConfiguration(conf))
- // A timestamp of when the disk was last accessed to check for log
updates
- private var lastLogCheckTimeMs = -1L
+ // The schedule thread pool size must be one, otherwise it will have
concurrent issues about fs
+ // and applications between check task and clean task..
--- End diff --
nit: too many periods
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