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https://issues.apache.org/jira/browse/SPARK-11556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14993759#comment-14993759
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Younes commented on SPARK-11556:
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Ah thanks! Didn't find it when I searched before.
> High spark.executor.memory causes wrong result
> ----------------------------------------------
>
> Key: SPARK-11556
> URL: https://issues.apache.org/jira/browse/SPARK-11556
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.1
> Reporter: Younes
>
> When setting spark.executor.memory too high, queries starts to return wrong
> result silently.
> My setting: 48GB ram servers
> When setting spark.executor.memory to 32G, any select on text column on
> parquet files, truncates the 1st 8 chars.
> When setting it to 30G, the problem goes away.
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