[jira] [Created] (SPARK-22873) Init lastReportTimestamp with system current time when start() called in AsyncEventQueue

["wuyi (JIRA)" <ji...@apache.org>]

wuyi created SPARK-22873:
----------------------------

             Summary: Init lastReportTimestamp with system current time when start() called in AsyncEventQueue
                 Key: SPARK-22873
                 URL: https://issues.apache.org/jira/browse/SPARK-22873
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.2.1
            Reporter: wuyi
            Priority: Minor



{code:java}
   if (droppedEventsCounter.compareAndSet(droppedCount, 0)) {
      val prevLastReportTimestamp = lastReportTimestamp
      lastReportTimestamp = System.currentTimeMillis()
      val previous = new java.util.Date(prevLastReportTimestamp)
      logWarning(s"Dropped $droppedEvents events from $name since $previous.")
   }
{code}
First time we log previous date, it would be "Thu Jan 01 08:00:00 CST 1970" because of lastReportTimestamp was inited by 0L. Although there is no mistake in theory, AsyncEventQueue's starting time seems better.



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