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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19524) newFilesOnly does not work according to docs.
Date Fri, 10 Feb 2017 20:28:41 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15861822#comment-15861822
] 

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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