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https://issues.apache.org/jira/browse/SPARK-26284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved SPARK-26284.
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Resolution: Invalid
> Spark History server object vs file storage behavior difference
> ---------------------------------------------------------------
>
> Key: SPARK-26284
> URL: https://issues.apache.org/jira/browse/SPARK-26284
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Damien Doucet-Girard
> Priority: Minor
>
> I am using the spark history server in order to view running/complete jobs on
> spark using the kubernetes scheduling backend introduced in 2.3.0. Using a
> local file path in both {color:#333333}{{spark.eventLog.dir}}{color} and
> {{spark.history.fs.logDirectory}}, I have no issue seeing both incomplete and
> completed tasks, with {{.inprogress}} files being flushed regularly. However,
> when using an {{s3a://}} path, it seems the calls to flush the file
> ([https://github.com/apache/spark/blob/dd518a196c2d40ae48034b8b0950d1c8045c02ed/core/src/main/scala/org/apache/spark/scheduler/EventLoggingListener.scala#L152-L154)]
> don't actually upload the file to s3. Due to this, I am unable to see
> currently incomplete tasks using an s3a path.
> From the behavior I've observed, it only uploads on completion of the task
> (hadoop 2.7) or upon the log file filling up the block size set for s3a
> {{spark.hadoop.fs.s3a.multipart.size}} (hadoop 3.0.0). Is this intended
> behavior?
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