使用 upload_jars 函数获取 GeoSpark 错误

Question

我正在尝试运行 AWS EMR 集群中的 GeoSpark。代码是：

#  coding=utf-8

from pyspark.sql import SparkSession
import pyspark.sql.functions as f
import pyspark.sql.types as t
from geospark.register import GeoSparkRegistrator
from geospark.utils import GeoSparkKryoRegistrator
from geospark.register import upload_jars

import config as cf

import yaml


if __name__ == "__main__":
    # Read files
    with open("/tmp/param.yml", 'r') as ymlfile:
        param = yaml.load(ymlfile, Loader=yaml.SafeLoader)
    
    # Register jars
    upload_jars()

    # Creation of spark session
    print("Creating Spark session")
    spark = SparkSession \
        .builder \
        .getOrCreate()
    
    GeoSparkRegistrator.registerAll(spark)

我在 upload_jars() 函数中遇到以下错误：

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/findspark.py", line 143, in init
    py4j = glob(os.path.join(spark_python, "lib", "py4j-*.zip"))[0]
IndexError: list index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "geo_processing.py", line 21, in <module>
    upload_jars()
  File "/usr/local/lib/python3.7/site-packages/geospark/register/uploading.py", line 39, in upload_jars
    findspark.init()
  File "/usr/local/lib/python3.7/site-packages/findspark.py", line 146, in init
    "Unable to find py4j, your SPARK_HOME may not be configured correctly"
Exception: Unable to find py4j, your SPARK_HOME may not be configured correctly

如何解决这个错误？

Answer 1

解决方案

您应该从您的代码中删除 upload_jars() 并以另一种方式加载 jar，或者将它们复制到 SPARK_HOME（从 emr-4.0.0 开始在 /usr/lib/spark ) 作为 EMR bootstrap 操作的一部分或在您的 spark-submit 命令中使用 --jars 选项。

说明

我无法让 upload_jars() 函数在多节点 EMR 集群上运行。根据 geospark documentation, upload_jars():

uses findspark Python package to upload jar files to executor and nodes. To avoid copying all the time, jar files can be put in directory SPARK_HOME/jars or any other path specified in Spark config files.

Spark 在 EMR 上以 YARN 模式安装，这意味着它只安装在主节点上，而不是 core/task 节点上。因此，findspark 不会在 core/task 节点上找到 Spark，因此您会收到错误 Unable to find py4j, your SPARK_HOME may not be configured correctly.

使用 upload_jars 函数获取 GeoSpark 错误

Getting GeoSpark error with upload_jars function

python

amazon-web-services

amazon-emr

apache-spark

geospark

解决方案

说明