Jiang Xingbo created SPARK-20989:
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Summary: 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
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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