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https://issues.apache.org/jira/browse/SPARK-5770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320510#comment-14320510
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Sean Owen commented on SPARK-5770:
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Yeah I think that's the point, that overwriting an existing JAR won't cause any
classes to be reloaded, so, should it be an error? or a warning?
> Use addJar() to upload a new jar file to executor, it can't be added to
> classloader
> -----------------------------------------------------------------------------------
>
> Key: SPARK-5770
> URL: https://issues.apache.org/jira/browse/SPARK-5770
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: meiyoula
>
> First use addJar() to upload a jar to the executor, then change the jar
> content and upload it again. We can see the jar file in the local has be
> updated, but the classloader still load the old one. The executor log has no
> error or exception to point it.
> I use spark-shell to test it. And set "spark.files.overwrite" is true.
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