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https://issues.apache.org/jira/browse/SPARK-4076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182833#comment-14182833
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Apache Spark commented on SPARK-4076:
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User 'sarutak' has created a pull request for this issue:
https://github.com/apache/spark/pull/2930
> Parameter expansion in spark-config is wrong
> --------------------------------------------
>
> Key: SPARK-4076
> URL: https://issues.apache.org/jira/browse/SPARK-4076
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.2.0
> Reporter: Kousuke Saruta
> Priority: Minor
>
> In sbin/spark-config.sh, parameter expansion is used to extract source root
> as follows.
> {code}
> this="${BASH_SOURCE-$0}"
> {code}
> I think, the parameter expansion should be ":-" instead of "-".
> If we use "-" and BASH_SOURCE="", (empty character is set, not unset),
> "" (empty character) is set to $this.
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