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https://issues.apache.org/jira/browse/SPARK-880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129803#comment-14129803
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Sean Owen commented on SPARK-880:
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This should be resolved/obsoleted by subsequent updates to SLF4J and log4j
integration, and the props file.
> When built with Hadoop2, spark-shell and examples don't initialize log4j
> properly
> ---------------------------------------------------------------------------------
>
> Key: SPARK-880
> URL: https://issues.apache.org/jira/browse/SPARK-880
> Project: Spark
> Issue Type: Bug
> Reporter: Matei Zaharia
>
> They print this:
> {code}
> log4j:WARN No appenders could be found for logger
> (akka.event.slf4j.Slf4jEventHandler).
> log4j:WARN Please initialize the log4j system properly.
> log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more
> info.
> {code}
> It might have to do with not finding a log4j.properties file. I believe
> hadoop1 had one in its own JARs (or depended on an older log4j that came with
> a default)? but hadoop2 doesn't. We should probably have our own default one
> in conf.
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