pyspark installation issue

When I am running this step:

import sagemaker_pyspark
from pyspark.sql import SparkSession

classpath = ":".join(sagemaker_pyspark.classpath_jars())
spark = SparkSession.builder.config("spark.driver.extraClassPath", classpath).getOrCreate()

Getting following errors:
---------------------------------------------------------------------------
Exception Traceback (most recent call last)
in
3
4 classpath = ":".join(sagemaker_pyspark.classpath_jars())
----> 5 spark = SparkSession.builder.config("spark.driver.extraClassPath", classpath).getOrCreate()

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/sql/session.py in getOrCreate(self)
171 for key, value in self._options.items():
172 sparkConf.set(key, value)
--> 173 sc = SparkContext.getOrCreate(sparkConf)
174 # This SparkContext may be an existing one.
175 for key, value in self._options.items():

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/context.py in getOrCreate(cls, conf)
361 with SparkContext._lock:
362 if SparkContext._active_spark_context is None:
--> 363 SparkContext(conf=conf or SparkConf())
364 return SparkContext._active_spark_context
365

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/context.py in __init__(self, master, appName, sparkHome, pyFiles, environment, batchSize, serializer, conf, gateway, jsc, profiler_cls)
127 " note this option will be removed in Spark 3.0")
128
--> 129 SparkContext._ensure_initialized(self, gateway=gateway, conf=conf)
130 try:
131 self._do_init(master, appName, sparkHome, pyFiles, environment, batchSize, serializer,

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/context.py in _ensure_initialized(cls, instance, gateway, conf)
310 with SparkContext._lock:
311 if not SparkContext._gateway:
--> 312 SparkContext._gateway = gateway or launch_gateway(conf)
313 SparkContext._jvm = SparkContext._gateway.jvm
314

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/java_gateway.py in launch_gateway(conf)
44 :return: a JVM gateway
45 """
---> 46 return _launch_gateway(conf)
47
48

~/anaconda3/envs/python3/lib/python3.6/site-packages/pyspark/java_gateway.py in _launch_gateway(conf, insecure)
106
107 if not os.path.isfile(conn_info_file):
--> 108 raise Exception("Java gateway process exited before sending its port number")
109
110 with open(conn_info_file, "rb") as info:

Exception: Java gateway process exited before sending its port number

Reproduce the shown Python 3.6 setup using the sagemaker_pyspark import, classpath_jars(), and SparkSession.builder call. Start by checking the PySpark Java gateway failure and the installation/runtime prerequisites; done means SparkSession.getOrCreate() starts without the reported exception.

Written by the indexing model from the issue text.