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https://issues.apache.org/jira/browse/SPARK-6277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357072#comment-14357072
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Marcelo Vanzin commented on SPARK-6277:
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Sometimes I do miss being able to reference other configs and/or system
properties / env variables from the config. It would allow some interesting use
cases, at least from a distribution's point of view.
This should be pretty simple to achieve using the commons-config library,
although I'd prefer avoiding the dependency since it would be more friendly to
SPARK-4824.
> Allow Hadoop configurations and env variables to be referenced in
> spark-defaults.conf
> -------------------------------------------------------------------------------------
>
> Key: SPARK-6277
> URL: https://issues.apache.org/jira/browse/SPARK-6277
> Project: Spark
> Issue Type: Improvement
> Components: Spark Submit
> Affects Versions: 1.3.0, 1.2.1
> Reporter: Jianshi Huang
>
> I need to set spark.local.dir to use user local home instead of /tmp, but
> currently spark-defaults.conf can only allow constant values.
> What I want to do is to write:
> bq. spark.local.dir /home/${user.name}/spark/tmp
> or
> bq. spark.local.dir /home/${USER}/spark/tmp
> Otherwise I would have to hack bin/spark-class and pass the option through
> -Dspark.local.dir
> Jianshi
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