问题描述
当我尝试使用以下代码在终端上显示 spark 数据框时,我收到了“UnicodeEncodeError”:
from pyspark.sql.types import StructType,StructField,StringType,IntegerType
import pyspark
from elasticsearch import Elasticsearch
from elasticsearch.exceptions import NotFoundError
### Creating Spark Session
spark = SparkSession \
.builder \
.appName("test") \
.config("spark.executor.heartbeatInterval","60s") \
.getorCreate()
spark.conf.set('spark.sql.session.timeZone','UTC')
spark.sparkContext.setLogLevel("ERROR")
es_server_ip = "elasticsearch"
es_server_port = "9200"
es_conn = Elasticsearch("http://user:password@elasticsearch:9200",use_ssl=False,verify_certs=True)
#function to read dataframe from Elastic Search index
def readFromES(esIndex,esQuery):
esDf = spark.read.format("org.elasticsearch.spark.sql") \
.option("es.nodes",es_server_ip ) \
.option("es.port",es_server_port) \
.option("es.net.http.auth.user","user") \
.option("es.net.http.auth.pass","password") \
.option("es.net.ssl","false") \
.option("es.net.ssl.cert.allow.self.signed","true") \
.option("es.read.Metadata","false") \
.option("es.mapping.date.rich","false") \
.option("es.query",esQuery) \
.load(esIndex)
return esDf
#defining the elastic search query
q_ci = """{
"query": {
"match_all": {}
}
}"""
#invoking the function and saving the data to df1
df1 = readFromES("test_delete",q_ci)
df1.show(truncate=False)
错误:
df1.show(truncate=False)
文件“/opt/spark/python/lib/pyspark.zip/pyspark/sql/dataframe.py”,行
382,在显示 UnicodeEncodeError: 'ascii' codec can't encode character
位置 124 中的 '\ufffd':序号不在范围内 (128)
我需要如下输出
+--------------------+------+-----+
|hostname |kpi |value|
+--------------------+------+-----+
|host4 |cpu |95 |
|host3 |disk |90 |
|Apr�ngli |cpu |78 |
|host2 |memory|85 |
+--------------------+------+-----+
您可以使用以下代码模拟数据框
data1 = [("Apr�ngli","cpu",78),("host2","memory",85),("host3","disk",90),("host4",95),]
schema1= StructType([ \
StructField("hostname",StringType(),True),\
StructField("kpi",\
StructField("value",IntegerType(),True)
])
df1 = spark.createDataFrame(data=data1,schema=schema1)
df1.printSchema()
df1.show(truncate=False)
我采取的步骤: 正如其他stackoverflow答案中提到的,我做了以下但仍然收到错误
export PYTHONIOENCODING=utf8
版本详情:
PYTHON_VERSION=3.6.8
Spark version 2.4.5
解决方法
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