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https://issues.apache.org/jira/browse/SPARK-5007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14261097#comment-14261097
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Apache Spark commented on SPARK-5007:
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User 'YanTangZhai' has created a pull request for this issue:
https://github.com/apache/spark/pull/3845
> Try random port when startServiceOnPort to reduce the chance of port collision
> ------------------------------------------------------------------------------
>
> Key: SPARK-5007
> URL: https://issues.apache.org/jira/browse/SPARK-5007
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: YanTang Zhai
> Priority: Minor
>
> When multiple Spark programs are submitted at the same node (called
> springboard machine). The ports (default 4040) of these SparkUIs are from
> 4040 to 4056. Then the Spark programs submitted later would fail because of
> SparkUI port collision.
> The chance of port collision could be reduced by setting spark.ui.port or
> spark.port.maxRetries.
> However, I think it's better to try random port when startServiceOnPort to
> reduce the chance of port collision.
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