[jira] [Commented] (SPARK-16784) Configurable log4j settings

["Irina Truong (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-16784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16041856#comment-16041856 ] 

Irina Truong commented on SPARK-16784:
--------------------------------------

In 2.1.0, setting  "spark.driver.extraJavaOptions" to "-Dlog4j.configuration=file:/home/hadoop/log4j.properties" in SparkConfig seemed to work.

In 2.1.1, it does not work anymore, but setting it via "--driver-java-options" still works.

Is this a bug in 2.1.1?

> Configurable log4j settings
> ---------------------------
>
>                 Key: SPARK-16784
>                 URL: https://issues.apache.org/jira/browse/SPARK-16784
>             Project: Spark
>          Issue Type: Improvement
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Michael Gummelt
>
> I often want to change the logging configuration on a single spark job.  This is easy in client mode.  I just modify log4j.properties.  It's difficult in cluster mode, because I need to modify the log4j.properties in the distribution in which the driver runs.  I'd like a way of setting this dynamically, such as a java system property.  Some brief searching showed that log4j doesn't seem to accept such a property, but I'd like to open up this idea for further comment.  Maybe we can find a solution.



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