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https://issues.apache.org/jira/browse/SPARK-5631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14308005#comment-14308005
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DeepakVohra commented on SPARK-5631:
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The error is due to a different version of CDH4 and Hadoop used for
spark-1.2.0-bin-cdh4.tgz than in the Hadoop client, which is CDH4.2 MR1.
The download does not mention which version of CDH4 and Hadoop 1.0/2.0 is used.
If the version is not mentioned should imply any CDH4 version may be used, but
CDH 4.2 generates an error.
http://spark.apache.org/downloads.html
> Server IPC version 7 cannot communicate with client version 4
> ------------------------------------------------------------------
>
> Key: SPARK-5631
> URL: https://issues.apache.org/jira/browse/SPARK-5631
> Project: Spark
> Issue Type: Bug
> Components: Java API
> Affects Versions: 1.2.0
> Environment: Scala 2.10.4
> Spark 1.2
> CDH4.2
> Reporter: DeepakVohra
>
> A Spark application generates the error
> Server IPC version 7 cannot communicate with client version 4
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