python 使用Jupyter Notebook调试PySpark程序错误总结

项目场景：

在Ubuntu16.04 hadoop2.6.0 spark2.3.1环境下 简单调试一个PySpark程序，中间遇到的错误总结（发现版对应和基础配置很重要）

注意：在前提安装配置好         hadoop hive anaconda jupyternotebook spark zookeeper

（有机会可以安排一下教程）

问题：

pyspark发现没有出现spark图标

cuihaipeng01@hadoop1:~$ pyspark

Python 3.7.6 (default, Jan 8 2020, 19:59:22)

[GCC 7.3.0] :: Anaconda, Inc. on linux

Type "help", "copyright", "credits" or "license" for more information.

SLF4J: Class path contains multiple SLF4J bindings.

SLF4J: Found binding in [jar:file:/apps/spark/jars/slf4j-log4j12-1.7.16.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: Found binding in [jar:file:/apps/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

2023-11-17 14:14:21 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Setting default log level to "WARN".

To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).

Traceback (most recent call last):

File "/apps/spark/python/pyspark/shell.py", line 45, in

spark = SparkSession.builder\

File "/apps/spark/python/pyspark/sql/session.py", line 173, in getOrCreate

sc = SparkContext.getOrCreate(sparkConf)

File "/apps/spark/python/pyspark/context.py", line 343, in getOrCreate

SparkContext(conf=conf or SparkConf())

File "/apps/spark/python/pyspark/context.py", line 118, in __init__

conf, jsc, profiler_cls)

File "/apps/spark/python/pyspark/context.py", line 186, in _do_init

self._accumulatorServer = accumulators._start_update_server()

File "/apps/spark/python/pyspark/accumulators.py", line 259, in _start_update_server

server = AccumulatorServer(("localhost", 0), _UpdateRequestHandler)

File "/apps/anaconda3/lib/python3.7/socketserver.py", line 452, in __init__

self.server_bind()

File "/apps/anaconda3/lib/python3.7/socketserver.py", line 466, in server_bind

self.socket.bind(self.server_address)

socket.gaierror: [Errno -2] Name or service not known

>>>

原因分析：

注意到这句话

socket.gaierror: [Errno -2] Name or service not known

导致这个问题的原因有： 1.SPARK_MASTER_IP没有指定

2.没有导入pyspark库

1.检查SPARK_MASTER_IP

编辑spark-env.sh配置文件

vim /apps/spark/conf/spark-env.sh

export SPARK_DIST_CLASSPATH=$(/apps/hadoop/bin/hadoop classpath)

export HADOOP_CONF_DIR=/apps/hadoop/etc/hadoop

export JAVA_HOME=/apps/java

export SPARK_MASTER_IP=cuihaipeng01

  发现我的配置是没有问题的，我这里的cuihaipeng01是我映射的主机名，对应的ip是没有问题的，于是排除了这个问题。

2.检查是否导入pyspark库

用pip list命令查看python库

解决方案：

发现没有pyspark库，于是发现了问题所在，于是有了下面的问题

（这里一定要指定版本：对应自己的spark版本就可以，比如spark2.3.1 那就下载 pyspark2.3.1）

用pip install pystark 发现报错，即使带了镜像也有问题，后来查资料说是因为资源库在国外用了

解决方法：国内的资源库

pip install -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com pyspark==2.3.1

发现还是不行，报别的错误了

解决方法：下载finspark库和requests库

pip install -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com findspark

pip install -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com requests

最后再次执行：

pip install -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com pyspark==2.3.1

安装成功

再次执行pyspark

这里发现一个警告，但是查看~/.bashrc下发现配置是没有问题的

#hadoop

export HADOOP_HOME=/apps/hadoop

export PATH=$HADOOP_HOME/bin:$PATH

export JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/native

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

于是直接在ubuntu上执行了pyspark进行测试

创建test.py

import findspark

findspark.init()

from pyspark import SparkConf, SparkContext

conf = SparkConf().setMaster("spark://cuihaipeng01:7077").setAppName("My App").set("spark.ui.port", "4050")

sc = SparkContext(conf = conf)

logFile = "file:///apps/spark/README.md"

logData = sc.textFile(logFile, 2).cache()

numAs = logData.filter(lambda line: 'a' in line).count()

numBs = logData.filter(lambda line: 'b' in line).count()

print('Lines with a: %s, Lines with b: %s' % (numAs, numBs))

这里的 "spark://cuihaipeng01:7077"是我指定的spark-master，因为我搭建的是四台主机，一台master和三台slave

本地的可以是local

启动pyspark后重新打开一个终端执行文件

python3 ~/test.py

在jupyter notebook上执行pyspark程序：

重新打开一个终端执行

jupyter notebook

执行过程：

执行成功

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