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https://issues.apache.org/jira/browse/SPARK-9378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643044#comment-14643044
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Cheng Lian commented on SPARK-9378:
-----------------------------------
Updated the ticket title and description, as I don't think this issue is
related to removing the old Parquet code. More detailed information can be
found here https://github.com/apache/spark/pull/7700
> Test case "CTAS with serde" fails occasionally
> ----------------------------------------------
>
> Key: SPARK-9378
> URL: https://issues.apache.org/jira/browse/SPARK-9378
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> The reason why "CTAS with serde" fails is that the {{MetastoreRelation}} gets
> converted to a Parquet data source relation by default.
> However, this behavior can be reproduced pretty steadily. I'm pretty puzzled
> why this test case only fails occasionally. A possible explanation is that,
> some test cases may set {{spark.sql.hive.convertMetastoreParquet}} to false
> without properly restoring the original value. When such a test case is
> executed before "CTAS with serde", no failure occurs.
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