我是Spark和BigData组件-HBase的新手,我正在尝试用Pyspark编写Python代码,并连接到HBase以从HBase读取数据。我正在使用以下版本:
spark-3.1.2-bin-hadoop2.7
3.8.5
hbase-2.3.5
我已经在ubuntu 20.04的本地版本中安装了独立的Hbase和Spark
代码:
from pyspark import SparkContext
from pyspark.sql import SQLContext
sc = SparkContext.getOrCreate()
sqlc = SQLContext(sc)
data_source_format = 'org.apache.spark.sql.execution.datasources.hbase'
df = sc.parallelize([("1","Abby","Smith","K","3456main","Orlando","FL","45235"),
("2","Amaya","Williams","L","123Orange","Newark","NJ","27656"),("3","Alchemy","Davis","P","Warners","Sanjose","CA","34789")])
.toDF(schema=['key','firstName','lastName','middleName','addressLine','city','state','zipCode'])
df.show()
catalog=''.join('''{
"table":{"namespace":"emp_data","name":"emp_info"},
"rowkey":"key",
"columns":{
"key":{"cf":"rowkey","col":"key","type":"string"},
"fName":{"cf":"person","col":"firstName","type":"string"},
"lName":{"cf":"person","col":"lastName","type":"string"},
"mName":{"cf":"person","col":"middleName","type":"string"},
"addressLine":{"cf":"address","col":"addressLine","type":"string"},
"city":{"cf":"address","col":"city","type":"string"},
"state":{"cf":"address","col":"state","type":"string"},
"zipCode":{"cf":"address","col":"zipCode","type":"string"}
}
}'''.split())
#Writing
print("Writing into HBase")
df.write\
.options(catalog=catalog)\
.format(data_source_format)\
.save()
#Reading
print("Readig from HBase")
df = sqlc.read\
.options(catalog=catalog)\
.format(data_source_format)\
.load()
print("Program Ends")
错误消息:
写入HBase
回溯(最近一次呼叫最后一次):
文件“/mnt/c/Codefiles/pyspark_test.py”,第36行,在
df.write
文件“/home/aditya/spark-3.1.2-bin-
hadoop2.7/python/lib/pyspark.zip/pyspark/sql/readwriter.py”,第行
1107,保存中
文件“/home/aditya/spark-3.1.2-bin-hadoop2.7/python/lib/py4j-0.10.9-
src.zip/py4j/java_gateway.py”,第1304行,在调用中
文件“/home/aditya/spark-3.1.2-bin-
hadoop2.7/python/lib/pyspark.zip/pyspark/sql/utils.py”,第111行,在
德科
文件“/home/aditya/spark-3.1.2-bin-hadoop2.7/python/lib/py4j-0.10.9-
src.zip/py4j/protocol.py”,第326行,在get\u return\u值中
py4j.protocol.Py4JJavaError:调用时出错
o63.节约。
:java.lang.NoClassDefFoundError:org/apache/spark/Logging
位于java.lang.ClassLoader.defineClass1(本机方法)
位于java.lang.ClassLoader.defineClass(ClassLoader.java:756)
目前没有回答
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