[英]Apache Spark 3.1.2 can't read from S3 via documented spark-hadoop-cloud
The spark docmentation suggests using spark-hadoop-cloud
to read / write from S3 in https://spark.apache.org/docs/latest/cloud-integration.html . spark 文档建议使用spark-hadoop-cloud
从https://spark.apache.org/docs/latest/cloud-integration.html中的 S3 读取/写入。
There is no apache spark published artifact for spark-hadoop-cloud. spark-hadoop-cloud 没有 apache spark 发布的工件。 Then when trying to use the Cloudera published module the following exception occurs然后当尝试使用 Cloudera 发布的模块时,会发生以下异常
Exception in thread "main" java.lang.NoSuchMethodError: 'void com.google.common.base.Preconditions.checkArgument(boolean, java.lang.String, java.lang.Object, java.lang.Object)'
at org.apache.hadoop.fs.s3a.S3AUtils.lookupPassword(S3AUtils.java:894)
at org.apache.hadoop.fs.s3a.S3AUtils.lookupPassword(S3AUtils.java:870)
at org.apache.hadoop.fs.s3a.S3AUtils.getEncryptionAlgorithm(S3AUtils.java:1605)
at org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:363)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3303)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:124)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3352)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3320)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:479)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:361)
at org.apache.spark.sql.execution.streaming.FileStreamSink$.hasMetadata(FileStreamSink.scala:46)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:377)
at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:325)
at org.apache.spark.sql.DataFrameReader.$anonfun$load$3(DataFrameReader.scala:307)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:307)
at org.apache.spark.sql.DataFrameReader.json(DataFrameReader.scala:519)
at org.apache.spark.sql.DataFrameReader.json(DataFrameReader.scala:428)
This seems like a classpath conflict.这似乎是类路径冲突。 Then it seems like it's not possible to use spark-hadoop-cloud to read with the vanilla apache spark 3.1.2 jars然后似乎无法使用 spark-hadoop-cloud 与 vanilla apache spark 3.1.2 jars 一起阅读
version := "0.0.1"
scalaVersion := "2.12.12"
lazy val app = (project in file("app")).settings(
assemblyPackageScala / assembleArtifact := false,
assembly / assemblyJarName := "uber.jar",
assembly / mainClass := Some("com.example.Main"),
// more settings here ...
)
resolvers += "Cloudera" at "https://repository.cloudera.com/artifactory/cloudera-repos/"
libraryDependencies += "org.apache.spark" %% "spark-core" % "3.1.1" % "provided"
libraryDependencies += "org.apache.spark" %% "spark-sql" % "3.1.1" % "provided"
libraryDependencies += "org.apache.spark" %% "spark-hadoop-cloud" % "3.1.1.3.1.7270.0-253"
libraryDependencies += "org.apache.hadoop" % "hadoop-aws" % "3.1.1.7.2.7.0-184"
libraryDependencies += "org.apache.hadoop" % "hadoop-client" % "3.1.1.7.2.7.0-184"
libraryDependencies += "com.amazonaws" % "aws-java-sdk-bundle" % "1.11.901"
libraryDependencies += "com.github.mrpowers" %% "spark-daria" % "0.38.2"
libraryDependencies += "com.github.mrpowers" %% "spark-fast-tests" % "0.21.3" % "test"
libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.1" % "test"
import org.apache.spark.sql.SparkSession
object SparkApp {
def main(args: Array[String]){
val spark = SparkSession.builder().master("local")
//.config("spark.jars.repositories", "https://repository.cloudera.com/artifactory/cloudera-repos/")
//.config("spark.jars.packages", "org.apache.spark:spark-hadoop-cloud_2.12:3.1.1.3.1.7270.0-253")
.appName("spark session").getOrCreate
val jsonDF = spark.read.json("s3a://path-to-bucket/compact.json")
val csvDF = spark.read.format("csv").load("s3a://path-to-bucket/some.csv")
jsonDF.show()
csvDF.show()
}
}
To read and write to S3 from Spark you only need these 2 dependencies:要从 Spark 读取和写入 S3,您只需要这两个依赖项:
"org.apache.hadoop" % "hadoop-aws" % hadoopVersion,
"org.apache.hadoop" % "hadoop-common" % hadoopVersion
Make sure the haddopVersion is the same used by your worker nodes and make sure your workers node also have these dependencies available.确保 haddopVersion 与您的工作节点使用的相同,并确保您的工作节点也具有可用的这些依赖项。 The rest of your code looks correct.您的代码的 rest 看起来是正确的。
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