SparkContext¶

SparkContext is a Python class.

JavaGateway¶

SparkContext defines _gateway property for a JavaGateway that is given or launched when _ensure_initialized.

JVMView¶

SparkContext defines _jvm property for a JVMView (py4j) to access to the Java Virtual Machine of the JavaGateway.

_ensure_initialized¶

_ensure_initialized(
  cls, instance=None,
  gateway=None,
  conf=None)

_ensure_initialized is a @classmethod.

_ensure_initialized...FIXME

_ensure_initialized is used when:

• SparkContext is __init__ and setSystemProperty
• pyspark/shell.py is launched