Hi,
I'm trying to figure out how to use a third party jar inside a python
program which I'm running via PyCharm in order to debug it. I am normally
able to run spark code in python such as this:
spark_conf = SparkConf().setMaster('local').setAppName('test')
sc = SparkContext(conf=spark_conf)
cars = sc.textFile('c:/cars.csv')
print cars.count()
sc.stop()
The code I'm trying to run is below - it uses the databricks spark csv jar.
I can get it working fine in pyspark shell using the packages argument, but
I can't figure out how to get it to work via PyCharm.
from pyspark.sql import SQLContext
from pyspark import SparkConf, SparkContext
spark_conf = SparkConf().setMaster('local').setAppName('test')
sc = SparkContext(conf=spark_conf)
sqlContext = SQLContext(sc)
df = sqlContext.load(source="com.databricks.spark.csv", header="true", path
= "c:/cars.csv", delimiter='\t')
df.select("year")
The error message I'm getting is:
py4j.protocol.Py4JJavaError: An error occurred while calling o20.load.
: java.lang.RuntimeException: Failed to load class for data source:
com.databricks.spark.csv
at scala.sys.package$.error(package.scala:27)
at
org.apache.spark.sql.sources.ResolvedDataSource$.lookupDataSource(ddl.scala:194)
at org.apache.spark.sql.sources.ResolvedDataSource$.apply(ddl.scala:205)
at org.apache.spark.sql.SQLContext.load(SQLContext.scala:697)
at org.apache.spark.sql.SQLContext.load(SQLContext.scala:685)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379)
at py4j.Gateway.invoke(Gateway.java:259)
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)
I presume I need to set the spark classpath somehow but I'm not sure of the
right way to do it. Any advice/guidance would be appreciated.
Thanks,
Mark.
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