[jira] [Updated] (SPARK-21147) the schema of socket/rate source can not be set.

["Shixiong Zhu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-21147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shixiong Zhu updated SPARK-21147:
---------------------------------
    Summary: the schema of socket/rate source can not be set.  (was: the schema of socket source can not be set.)

> the schema of socket/rate source can not be set.
> ------------------------------------------------
>
>                 Key: SPARK-21147
>                 URL: https://issues.apache.org/jira/browse/SPARK-21147
>             Project: Spark
>          Issue Type: Bug
>          Components: Structured Streaming
>    Affects Versions: 2.1.0
>         Environment: Win7,spark 2.1.0
>            Reporter: Fei Shao
>
> The schema set for DataStreamReader can not work. The code is shown as below:
> val line = ss.readStream.format("socket")
> .option("ip",xxx)
> .option("port",xxx)
> .schema( StructField("name",StringType)::StructField("area",StringType)::Nil)
> .load
> line.printSchema
> The printSchema prints:
> root
> |--value:String(nullable=true)
> According to the code, it should print the schema set by schema().
> Suggestion from Michael Armbrust:
> throw an exception saying that you can't set schema here.



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