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https://issues.apache.org/jira/browse/SPARK-7261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14579836#comment-14579836
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Apache Spark commented on SPARK-7261:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/6734
> Change default log level to WARN in the REPL
> --------------------------------------------
>
> Key: SPARK-7261
> URL: https://issues.apache.org/jira/browse/SPARK-7261
> Project: Spark
> Issue Type: Improvement
> Components: Spark Shell
> Reporter: Patrick Wendell
> Assignee: Shixiong Zhu
> Priority: Blocker
> Labels: starter
>
> We should add a log4j properties file for the repl
> (log4j-defaults-repl.properties) that has the level of warning. The main
> reason for doing this is that we now display nice progress bars in the REPL
> so the need for task level INFO messages is much less.
> The best way to accomplish this is the following:
> 1. Add a second logging defaults file called log4j-defaults-repl.properties
> that has log level WARN.
> https://github.com/apache/spark/blob/branch-1.4/core/src/main/resources/org/apache/spark/log4j-defaults.properties
> 2. When logging is initialized, check whether you are inside the REPL. If so,
> then use that one:
> https://github.com/apache/spark/blob/branch-1.4/core/src/main/scala/org/apache/spark/Logging.scala#L124
> 3. The printed message should say something like:
> Using Spark's repl log4j profile:
> org/apache/spark/log4j-defaults-repl.properties
> To adjust logging level use sc.setLogLevel("INFO")
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