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From "Wenchen Fan (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-26794) SparkSession enableHiveSupport does not point to hive but in-memory while the SparkContext exists
Date Thu, 14 Feb 2019 07:09:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-26794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wenchen Fan reassigned SPARK-26794:
-----------------------------------

    Assignee: Kent Yao

> SparkSession enableHiveSupport does not point to hive but in-memory while the SparkContext
exists
> -------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-26794
>                 URL: https://issues.apache.org/jira/browse/SPARK-26794
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.2
>            Reporter: Kent Yao
>            Assignee: Kent Yao
>            Priority: Major
>
> {code:java}
> public class SqlDemo
> {
>     public static void main(final String[] args) throws Exception {
>      
>         SparkConf conf = new SparkConf().setAppName("spark-sql-demo");
>         JavaSparkContext sc = new JavaSparkContext(conf);
>         SparkSession ss = SparkSession.builder().enableHiveSupport().getOrCreate();
>         ss.sql("show databases").show();
>         }
>         
>     }
> }
> {code}
> Before SPARK-20946, the demo above point to the right hive metastore if the hive-site.xml
is present. But now it can only point to the default in-memory one.
> Catalog is now as a variable shared across SparkSessions, it is instantiated with SparkContext's
conf. After SPARK-20946, Session level configs are not pass to SparkContext's conf anymore,
so the enableHiveSupport API takes no affect on the catalog instance.
> You can set spark.sql.catalogImplementation=hive application wide to solve the problem,
or never create a sc before you call SparkSession.builder().enableHiveSupport().getOrCreate()



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