Jon Morra commented on SPARK-5377:

I would like to revisit this issue as well.  Some of our jobs which require on 
the fly compilation (such as scoring an H2O model) won't work in cluster mode 
without this.

> Dynamically add jar into Spark Driver's classpath.
> --------------------------------------------------
>                 Key: SPARK-5377
>                 URL: https://issues.apache.org/jira/browse/SPARK-5377
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.2.0
>            Reporter: Chengxiang Li
> Spark support dynamically add jar to executor classpath through 
> SparkContext::addJar(), while it does not support dynamically add jar into 
> driver classpath. In most case(if not all the case), user dynamically add jar 
> with SparkContext::addJar()  because some classes from the jar would be 
> referred in upcoming Spark job, which means the classes need to be loaded in 
> Spark driver side either,e.g during serialization. I think it make sense to 
> add an API to add jar into driver classpath, or just make it available in 
> SparkContext::addJar(). HIVE-9410 is a real case from Hive on Spark.

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