Hello , I have installed Spark 1.3.1 binary hadoop on my windows machine. I had setup appropriate paths ( see below) but when I run, it is not able to initiate context and it fails with error:   Traceback (most recent call last):   File "C:/Users/N600173/PycharmProjects/Test/test.py", line 30, in <module>     sc = SparkContext(master="local")   File "C:\dev\spark-1.3.1-bin-hadoop2.3\python\pyspark\context.py", line 107, in __init__     SparkContext._ensure_initialized(self, gateway=gateway)   File "C:\dev\spark-1.3.1-bin-hadoop2.3\python\pyspark\context.py", line 221, in _ensure_initialized     SparkContext._gateway = gateway or launch_gateway()   File "C:\dev\spark-1.3.1-bin-hadoop2.3\python\pyspark\java_gateway.py", line 79, in launch_gateway     raise Exception("Java gateway process exited before sending the driver its port number") Exception: Java gateway process exited before sending the driver its port number   What does this mean ? Note : I am able to run successfully the Spark shell.     Code: os.environ['SPARK_HOME'] = "C:/spark-1.2.0-bin-hadoop2.3" os.environ['JAVA_HOME'] = "C:/jdk1.7.0_45" sys.path.append("C:/spark-1.2.0-bin-hadoop2.3/python") sys.path.append("C:/spark-1.2.0-bin-hadoop2.3/python/lib/py4j-0.8.2.1-src.zip") sys.path.append("C:/spark-1.2.0-bin-hadoop2.3/lib/spark-assembly-1.2.0-hadoop2.3.0.jar") sys.path.append("C:/jdk1.7.0_45/bin") from pyspark import SparkContext sc = SparkContext(master="local") <-- This fails !   ... View more