无法在Google Colab中运行Pyspark

Question

嗨，我正在尝试使用以下代码在google colab上运行pyspark：

!apt-get install openjdk-8-jdk-headless -qq > /dev/null
!wget -q http://apache.osuosl.org/spark/spark-2.4.5/spark-2.4.5-bin-hadoop2.7.tgz
!tar xf spark-2.4.5-bin-hadoop2.7.tgz
!pip install -q findspark

import os
os.environ["JAVA_HOME"] = "/usr/lib/jvm/java-8-openjdk-amd64"
os.environ["SPARK_HOME"] = "/content/spark-2.4.5-bin-hadoop2.7"

import findspark
findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.master("local[*]").getOrCreate()

我收到以下错误：

/content/spark-2.4.5-bin-hadoop2.7/python/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

注意：我可以将这段代码运行到今天下午，突然这个错误在晚上开始出现

Answer 1

Google collab已预先安装了Java。因此，如果您只运行

!pip install pyspark

然后使用spark即可。.不需要findspark或其他不必要的库。