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https://issues.apache.org/jira/browse/SPARK-4257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14201658#comment-14201658
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jiezhou commented on SPARK-4257:
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In start-master.sh, the SPARK_MASTER_IP's default value is empty string, so it
is set `hostname`.
And only if SPARK_MASTER_IP is explicitly set in advance in configuration file
like conf/spark-env.sh, the spark shell can connect to standalone master by
spark://IP:7077.
> Spark master can only be accessed by hostname
> ---------------------------------------------
>
> Key: SPARK-4257
> URL: https://issues.apache.org/jira/browse/SPARK-4257
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.2.0
> Reporter: Davies Liu
> Priority: Critical
>
> After sbin/start-all.sh, the spark shell can not connect to standalone master
> by spark://IP:7077, it works if replace IP by hostname.
> In the docs[1], it says use `spark://IP:PORT` to connect to master.
> [1] http://spark.apache.org/docs/latest/spark-standalone.html
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