Creating sparkContext on Google Colab gives: `RuntimeError: Java gateway process exited before sending its port number`

Question

以下是依赖，安装成功。

!apt-get install openjdk-8-jre
!apt-get install scala
!pip install py4j
!wget -q https://downloads.apache.org/spark/spark-2.4.8/spark-2.4.8-bin-hadoop2.7.tgz
!tar xf spark-2.4.8-bin-hadoop2.7.tgz
!pip install -q findspark

现在创建 spark 上下文：

# Setting up environment variables
import os
os.environ["JAVA_HOME"] = "/usr/lib/jvm/java-8-openjdk-amd64"
os.environ["SPARK_HOME"] = "/content/spark-2.4.8-bin-hadoop2.7"
# export PYSPARK_SUBMIT_ARGS ="--master local[2]"

# Importing and initating spark
import findspark
findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.master("local[*]").appName("Test Setup").getOrCreate()
sc = spark.sparkContext

我收到此错误：

RuntimeError: Java gateway process exited before sending its port number

请注意，这是一个 colab notebook。任何形式的帮助都会很棒。

Answer 1

您可以安装 Pyspark using PyPI 作为替代：

For Python users, PySpark also provides pip installation from PyPI. This is usually for local usage or as a client to connect to a cluster instead of setting up a cluster itself.

安装pyspark + openjdk

%pip install pyspark==2.4.8
!apt-get install openjdk-8-jdk-headless -qq > /dev/null

创建 spark 会话

from pyspark.sql import SparkSession

spark = SparkSession.builder\
        .master("local[*]")\
        .appName("Test Setup")\
        .getOrCreate()

在 Google Colab Notebook 中测试：

Creating sparkContext on Google Colab gives: `RuntimeError: Java gateway process exited before sending its port number`

Creating sparkContext on Google Colab gives: `RuntimeError: Java gateway process exited before sending its port number`

python

apache-spark

pyspark

google-colaboratory

py4j

安装pyspark + openjdk

创建 spark 会话