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https://issues.apache.org/jira/browse/SPARK-20989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-20989:
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Assignee: Apache Spark
> Fail to start multiple workers on one host if external shuffle service is
> enabled in standalone mode
> ----------------------------------------------------------------------------------------------------
>
> Key: SPARK-20989
> URL: https://issues.apache.org/jira/browse/SPARK-20989
> Project: Spark
> Issue Type: Bug
> Components: Deploy, Spark Core
> Affects Versions: 2.1.1
> Reporter: Jiang Xingbo
> Assignee: Apache Spark
> Priority: Minor
>
> In standalone mode, if we enable external shuffle service by setting
> `spark.shuffle.service.enabled` to true, and then we try to start multiple
> workers on one host(by setting `SPARK_WORKER_INSTANCES=3` in spark-env.sh,
> and then run `sbin/start-slaves.sh`), we can only launch one worker on each
> host successfully and the rest of the workers fail to launch.
> The reason is the port of external shuffle service if configed by
> `spark.shuffle.service.port`, so currently we could start no more than one
> external shuffle service on each host. In our case, each worker tries to
> start a external shuffle service, and only one of them successed doing this.
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