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

["HanCheol Cho (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-16784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099477#comment-16099477 ] 

HanCheol Cho commented on SPARK-16784:
--------------------------------------

Hi, 

I used the following options that allows both driver & executors use a custom log4j.properties,
{code}
spark-submit \
  --driver-java-options=-Dlog4j.configuration=conf/log4j.properties \
  --files conf/log4j.properties \
  --conf "spark.executor.extraJavaOptions='-Dlog4j.configuration=log4j.properties'" \
  ...
{code}
I used a local log4j.properties file for the driver and the file in the distributed cache (by --files option) for the executors.
As shown above, the paths to driver and executors are different.

I hope it might be useful to the others.



> 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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