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https://issues.apache.org/jira/browse/SPARK-12775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15093858#comment-15093858
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Sean Owen commented on SPARK-12775:
-----------------------------------
Hm, I don't think that's a spark problem though.
> Couldn't find leader offsets exception when hostname can't be resolved
> ----------------------------------------------------------------------
>
> Key: SPARK-12775
> URL: https://issues.apache.org/jira/browse/SPARK-12775
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.6.0
> Reporter: Sebastian Piu
> Priority: Minor
>
> When hostname resolution fails for a broker an unclear/misleading error is
> shown:
> org.apache.spark.SparkException: java.nio.channels.ClosedChannelException
> org.apache.spark.SparkException: Couldn't find leader offsets for
> Set([mytopic,0], [mytopic,18], [mytopic,12], [mytopic,6])
> at
> org.apache.spark.streaming.kafka.KafkaCluster$$anonfun$checkErrors$1.apply(KafkaCluster.scala:366)
> at
> org.apache.spark.streaming.kafka.KafkaCluster$$anonfun$checkErrors$1.apply(KafkaCluster.scala:366)
> Error above ocurred when a broker was added to the cluster and my machine
> could not resolve its hostname
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