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https://issues.apache.org/jira/browse/SPARK-993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matei Zaharia resolved SPARK-993.
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Resolution: Won't Fix
We investigated this for 1.0 but found that many InputFormats behave wrongly if
you try to clone the object, so we won't fix it.
> Don't reuse Writable objects in HadoopRDDs by default
> -----------------------------------------------------
>
> Key: SPARK-993
> URL: https://issues.apache.org/jira/browse/SPARK-993
> Project: Spark
> Issue Type: Improvement
> Reporter: Matei Zaharia
>
> Right now we reuse them as an optimization, which leads to weird results when
> you call collect() on a file with distinct items. We should instead make that
> behavior optional through a flag.
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