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https://issues.apache.org/jira/browse/SPARK-31395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-31395.
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Resolution: Not A Problem
> [SPARK][Core]preferred location causing single node be a hot spot
> -----------------------------------------------------------------
>
> Key: SPARK-31395
> URL: https://issues.apache.org/jira/browse/SPARK-31395
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.4, 2.4.5
> Reporter: StephenZou
> Priority: Minor
>
> my job is run as follows:
> # build model, model is saved in HDFS named prob1. prob2. probN
> # then load it to RDD from certain ProbInputformat
> # do some calculation
> The driver node which builds the model is scheduled more frequently than
> other nodes, because the HDFS block is firstly written to itself. The
> scheduling hot spot is unnecessary, and should better be flattened.
>
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