java.lang.NoClassDefFoundError: org/jets3t/service/ServiceException

Question

我正试图在我的AWS胶水读卡器脚本中从s3读取csv文件。以下是代码片段：

import sys
import os
from awsglue.transforms import *
from awsglue.utils import getResolvedOptions
from pyspark.context import SparkContext
from awsglue.context import GlueContext
from awsglue.job import Job

argList = ['config']
args = getResolvedOptions(sys.argv,argList)

print(f"The config path is: {args['config']}")

sc = SparkContext.getOrCreate()
sch = sc._jsc.hadoopConfiguration()
glueContext = GlueContext(sc)
spark = glueContext.spark_session

sch.set("fs.s3.impl","org.apache.hadoop.fs.s3native.NativeS3FileSystem")
sch.set("fs.s3.canned.acl","BucketOwnerFullControl")

source_path_url = "s3://bucket/folder"
df = spark.read.option("header", "true").option("inferSchema", "true").csv(source_path_url)

在执行时，我会收到以下错误：

: java.lang.NoClassDefFoundError: org/jets3t/service/ServiceException
    at org.apache.hadoop.fs.s3native.NativeS3FileSystem.createDefaultStore(NativeS3FileSystem.java:343)
    at org.apache.hadoop.fs.s3native.NativeS3FileSystem.initialize(NativeS3FileSystem.java:333)
    at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2859)
    at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:99)
    at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2896)
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2878)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:392)
    at org.apache.hadoop.fs.Path.getFileSystem(Path.java:356)
    at org.apache.spark.sql.execution.streaming.FileStreamSink$.hasMetadata(FileStreamSink.scala:45)
    at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:332)
    at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:223)
    at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:211)
    at org.apache.spark.sql.DataFrameReader.csv(DataFrameReader.scala:615)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
    at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
    at py4j.Gateway.invoke(Gateway.java:282)
    at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
    at py4j.commands.CallCommand.execute(CallCommand.java:79)
    at py4j.GatewayConnection.run(GatewayConnection.java:238)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.jets3t.service.ServiceException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 24 more

我需要在胶水中提供jets3t罐吗？如果是的话，为什么是这样的，因为这些jars是通过胶水自动提供的，以防scala触发作业运行时。

Answer 1

我找到了解决办法。正如我在最初的文章中所怀疑的，您需要从外部下载jets3t jar并将其存储在某个s3位置。之后，您可以更新胶水作业的作业参数部分中存储的jar的路径，作为键：“

或者，您也可以在依赖的jars路径部分中设置jar的路径。