网站建设包括哪些服务千锋教育前端培训

前言

Pycharm配置了SSH服务器和Anaconda的python解释器，如果没有配置可参考 大数据单机学习环境搭建(8)Linux单节点Anaconda安装和Pycharm连接

Pycharm执行的脚本

执行如下 pyspark_model.py 的python脚本，构建SparkSession来执行sparksql

"""脚本名称：Pycharm使用pyspark测试功能：Pycharm远程执行sparksql
"""
from pyspark.sql import SparkSession
import osos.environ['SPARK_HOME'] = '/opt/spark'
os.environ['JAVA_HOME'] = '/opt/jdk1.8'spark = SparkSession.builder \.appName('pyspark_conda') \.master("yarn") \.config("spark.sql.warehouse.dir", "hdfs://bigdata01:8020/user/hive/warehouse") \.config("hive.metastore.uris", "thrift://bigdata01:9083") \.enableHiveSupport() \.getOrCreate()spark.sql('select * from hostnames limit 10;').show()spark.stop()

报错一：pyspark版本不匹配

例如我当前集群环境Spark3.0.0，python的pyspark3.5.0，没有指定版本默认下载了最新的

报错信息 [JAVA_GATEWAY_EXITED] Java gateway process exited before sending its port number., 具体如下：

ssh://slash@bigdata01:22/opt/python3/bin/python3 -u /home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py
JAVA_HOME is not set
Traceback (most recent call last):File "/home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py", line 7, in <module>spark = SparkSession.builder \File "/opt/python3/lib/python3.8/site-packages/pyspark/sql/session.py", line 497, in getOrCreatesc = SparkContext.getOrCreate(sparkConf)File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 515, in getOrCreateSparkContext(conf=conf or SparkConf())File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 201, in __init__SparkContext._ensure_initialized(self, gateway=gateway, conf=conf)File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 436, in _ensure_initializedSparkContext._gateway = gateway or launch_gateway(conf)File "/opt/python3/lib/python3.8/site-packages/pyspark/java_gateway.py", line 107, in launch_gatewayraise PySparkRuntimeError(
pyspark.errors.exceptions.base.PySparkRuntimeError: [JAVA_GATEWAY_EXITED] Java gateway process exited before sending its port number.

如果坚持不更换python的pyspark版本，即使像报错2已经指定了JAVA_HOME 依然会有其他报错。例如下方报错 Py4JError ，所以最彻底的方法是替换pyspark版本与spark版本一致

Traceback (most recent call last):File "/home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py", line 7, in <module>spark = SparkSession.builder \File "/opt/python3/lib/python3.8/site-packages/pyspark/sql/session.py", line 497, in getOrCreatesc = SparkContext.getOrCreate(sparkConf)File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 515, in getOrCreateSparkContext(conf=conf or SparkConf())File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 203, in __init__self._do_init(File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 316, in _do_initself._jvm.PythonUtils.getPythonAuthSocketTimeout(self._jsc)File "/opt/python3/lib/python3.8/site-packages/py4j/java_gateway.py", line 1549, in __getattr__raise Py4JError(
py4j.protocol.Py4JError: org.apache.spark.api.python.PythonUtils.getPythonAuthSocketTimeout does not exist in the JVM

报错二：JAVA_HOME指定不成功

python的pyspark已经重装3.0.0版本（下载时指定版本 pip install pyspark==3.0.0），报错信息 Java gateway process exited before sending its port number., JAVA_HOME is not set 具体如下：

ssh://slash@bigdata01:22/opt/python3/bin/python3 -u /home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py
JAVA_HOME is not set
Traceback (most recent call last):File "/home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py", line 7, in <module>spark = SparkSession.builder \File "/opt/python3/lib/python3.8/site-packages/pyspark/sql/session.py", line 186, in getOrCreatesc = SparkContext.getOrCreate(sparkConf)File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 371, in getOrCreateSparkContext(conf=conf or SparkConf())File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 128, in __init__SparkContext._ensure_initialized(self, gateway=gateway, conf=conf)File "/opt/python3/lib/python3.8/site-packages/pyspark/context.py", line 320, in _ensure_initializedSparkContext._gateway = gateway or launch_gateway(conf)File "/opt/python3/lib/python3.8/site-packages/pyspark/java_gateway.py", line 105, in launch_gatewayraise Exception("Java gateway process exited before sending its port number")
Exception: Java gateway process exited before sending its port number

指定内容如下：

# pyspark3.5.0指定了 SPARK_HOME JAVA_HOME还是会报错
# pyspark3.0.0指定后成功运行
os.environ['SPARK_HOME'] = '/opt/spark'
os.environ['JAVA_HOME'] = '/opt/jdk1.8'

报错三：python版本问题

最开始安装的最新版的anaconda环境，其中python3.11，安装pyspark3.0.0也会报错 TypeError: code() argument 13 must be str, not int，具体内容如下：

ssh://slash@bigdata01:22/opt/anaconda3/bin/python3.11 -u /home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py
Traceback (most recent call last):File "/home/slash/etl/dwtool/pyspark/pyspark_script/pyspark_model.py", line 1, in <module>from pyspark.sql import SparkSessionFile "/opt/anaconda3/lib/python3.11/site-packages/pyspark/__init__.py", line 51, in <module>from pyspark.context import SparkContextFile "/opt/anaconda3/lib/python3.11/site-packages/pyspark/context.py", line 30, in <module>from pyspark import accumulatorsFile "/opt/anaconda3/lib/python3.11/site-packages/pyspark/accumulators.py", line 97, in <module>from pyspark.serializers import read_int, PickleSerializerFile "/opt/anaconda3/lib/python3.11/site-packages/pyspark/serializers.py", line 71, in <module>from pyspark import cloudpickleFile "/opt/anaconda3/lib/python3.11/site-packages/pyspark/cloudpickle.py", line 209, in <module>_cell_set_template_code = _make_cell_set_template_code()^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^File "/opt/anaconda3/lib/python3.11/site-packages/pyspark/cloudpickle.py", line 172, in _make_cell_set_template_codereturn types.CodeType(^^^^^^^^^^^^^^^
TypeError: code() argument 13 must be str, not int

删除 /opt/anaconda3的文件夹后，重新安装了 Anaconda3-2021.05-Linux-x86_64.sh 版本的anaconda，其中python3.8，利用pyspark3.0.0第三方库操作spark3.0.0的计算引擎构建SparkSession，执行sparksql成功。

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声明：本文所载信息不保证准确性和完整性。文中所述内容和意见仅供参考，不构成实际商业建议，如有雷同纯属巧合。