[jira] [Resolved] (SPARK-22560) Must create spark session directly to connect to hive

["Ran Mingxuan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ran Mingxuan resolved SPARK-22560.
----------------------------------
          Resolution: Works for Me
       Fix Version/s: 2.2.0
    Target Version/s: 2.2.0

I add one line code to set spark context configuration after getting spark session configurations.

> Must create spark session directly to connect to hive
> -----------------------------------------------------
>
>                 Key: SPARK-22560
>                 URL: https://issues.apache.org/jira/browse/SPARK-22560
>             Project: Spark
>          Issue Type: Bug
>          Components: Java API, SQL
>    Affects Versions: 2.1.0, 2.2.0
>            Reporter: Ran Mingxuan
>             Fix For: 2.2.0
>
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> In a java project I have to use both JavaSparkContext  and SparkSession. I find the order to create them affect hive connection.
> I have built a spark job like below:
> {code:java}
> // wrong code
> public void main(String[] args)
> {
>     SparkConf sparkConf = new SparkConf().setAppName("testApp");
>     JavaSparkContext sc = new JavaSparkContext(sparkConf);
>     SparkSession spark = SparkSession.builder().sparkContext(sc.sc()).enableHiveSupport().getOrCreate();
>     spark.sql("show databases").show();
> }
> {code}
> and with this code spark job will not be able to find hive meta-store even if it can discover correct warehouse.
> I have to use code like below to make things work:
> {code:java}
> // correct code 
> public String main(String[] args)
> {
>     SparkConf sparkConf = new SparkConf().setAppName("testApp");
>     SparkSession spark = SparkSession.builder().config(sparkConf).enableHiveSupport().getOrCreate();
>     SparkContext sparkContext = spark.sparkContext();
>     JavaSparkContext sc = JavaSparkContext.fromSparkContext(sparkContext);
>     spark.sql("show databases").show();
> }
> {code}



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