vanzin commented on a change in pull request #27208: [SPARK-30481][CORE]
Integrate event log compactor into Spark History Server
URL: https://github.com/apache/spark/pull/27208#discussion_r367137498
##########
File path:
core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
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@@ -569,6 +570,35 @@ private[history] class FsHistoryProvider(conf: SparkConf,
clock: Clock)
}
}
+ /**
+ * Returns a tuple containing two values. Each element means:
+ * - 1st (Boolean): true if the list of event log files are changed, false
otherwise.
+ * - 2nd (Option[Long]): Some(value) if the method succeeds to try
compaction,
+ * value indicates the last event log index to try compaction. None
otherwise.
+ */
+ private def compact(reader: EventLogFileReader): (Boolean, Option[Long]) = {
+ reader.lastIndex match {
+ case Some(lastIndex) =>
+ try {
+ val info = listing.read(classOf[LogInfo], reader.rootPath.toString)
+ if (info.lastIndexToRunCompaction.isEmpty ||
+ info.lastIndexToRunCompaction.get < lastIndex) {
Review comment:
indent more
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