Hello guys, I'm very new to Spark and I'm having some troubles when reading a JSON to dataframe on PySpark.
I'm getting a JSON object from an API response and I would like to store it in Spark as a DataFrame (I've read that DataFrame is better than RDD, that's accurate?). For what I've read <http://spark.apache.org/docs/latest/sql-programming-guide.html#starting-point-sqlcontext> on documentation, I just need to call the method sqlContext.read.json in order to do what I want. *Following is the code from my test application:* json_object = json.loads(response.text) sc = SparkContext("local", appName="JSON to RDD") sqlContext = SQLContext(sc) dataframe = sqlContext.read.json(json_object) dataframe.show() *The problem is that when I run **"spark-submit myExample.py" I got the following error:* 15/09/29 01:18:54 INFO BlockManagerMasterEndpoint: Registering block manager localhost:48634 with 530.0 MB RAM, BlockManagerId(driver, localhost, 48634) 15/09/29 01:18:54 INFO BlockManagerMaster: Registered BlockManager Traceback (most recent call last): File "/home/paladini/ufxc/lisha/learning/spark-api-kairos/test1.py", line 35, in <module> dataframe = sqlContext.read.json(json_object) File "/opt/spark/python/lib/pyspark.zip/pyspark/sql/readwriter.py", line 144, in json File "/opt/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py", line 538, in __call__ File "/opt/spark/python/lib/pyspark.zip/pyspark/sql/utils.py", line 36, in deco File "/opt/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py", line 304, in get_return_value py4j.protocol.Py4JError: An error occurred while calling o21.json. Trace: py4j.Py4JException: Method json([class java.util.HashMap]) does not exist at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:333) at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:342) at py4j.Gateway.invoke(Gateway.java:252) at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133) at py4j.commands.CallCommand.execute(CallCommand.java:79) at py4j.GatewayConnection.run(GatewayConnection.java:207) at java.lang.Thread.run(Thread.java:745) *What I'm doing wrong? * Check out this gist <https://gist.github.com/paladini/2e2ea913d545a407b842> to see the JSON I'm trying to load. Thanks! Fernando Paladini
