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https://issues.apache.org/jira/browse/SPARK-19524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15861822#comment-15861822
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Sean Owen commented on SPARK-19524:
-----------------------------------
Ah, so you _don't_ want to only read new files. The behavior of
newFilesOnly=false is _not_ to read _all_ old files. The default other behavior
is as explained in the SO post. It reprocesses some window of recent data,
about a minute or so. You can control the size of this lookback with
spark.streaming.minRememberDuration which is minRememberDurationS in the code
(this is what I meant above.)
I think this is just the same question as was answered on SO then so this
should be closed.
> newFilesOnly does not work according to docs.
> ----------------------------------------------
>
> Key: SPARK-19524
> URL: https://issues.apache.org/jira/browse/SPARK-19524
> Project: Spark
> Issue Type: Bug
> Components: DStreams
> Affects Versions: 2.0.2
> Reporter: Egor Pahomov
>
> Docs says:
> newFilesOnly
> Should process only new files and ignore existing files in the directory
> It's not working.
> http://stackoverflow.com/questions/29852249/how-spark-streaming-identifies-new-files
> says, that it shouldn't work as expected.
> https://github.com/apache/spark/blob/master/streaming/src/main/scala/org/apache/spark/streaming/dstream/FileInputDStream.scala
> not clear at all in terms, what code tries to do
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