How to convert Spark Streaming data into Spark DataFrame

Spark has provided us with structured streaming which can solve such problems. It can generate streaming DataFrame i.e DataFrames being appended continuously. Please check below link

http://spark.apache.org/docs/latest/structured-streaming-programming-guide.html

Read the Error carefully..It says there is No output operations registered. Spark is Lazy and executes the job/ cod only when it has something to produce as a result. In your program there is no "Output Operation" and same is being complained by Spark.

Define a foreach() or Raw SQL Query over the DataFrame and then print the results. It will work fine.