Fei Shao created SPARK-21147:
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Summary: the schema of socket 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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