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https://issues.apache.org/jira/browse/SPARK-11828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012036#comment-15012036
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Apache Spark commented on SPARK-11828:
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User 'vanzin' has created a pull request for this issue:
https://github.com/apache/spark/pull/9820
> DAGScheduler source registered too early with MetricsSystem
> -----------------------------------------------------------
>
> Key: SPARK-11828
> URL: https://issues.apache.org/jira/browse/SPARK-11828
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.6.0
> Reporter: Marcelo Vanzin
> Priority: Minor
>
> I see this log message when starting apps on YARN:
> {quote}
> 15/11/18 13:12:56 WARN MetricsSystem: Using default name DAGScheduler for
> source because spark.app.id is not set.
> {quote}
> That's because DAGScheduler registers itself with the metrics system in its
> constructor, and the DAGScheduler is instantiated before "spark.app.id" is
> set in the context's SparkConf.
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