我正在本地运行pyspark版本2.3.2,似乎无法从AWS上的S3路径读取。
我得到的错误是:
Py4JJavaError: An error occurred while calling o41.load.
: java.io.IOException: No FileSystem for scheme: s3
at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2660)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2667)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:94)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2703)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2685)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:373)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at org.apache.spark.sql.execution.datasources.DataSource$.org$apache$spark$sql$execution$datasources$DataSource$$checkAndGlobPathIfNecessary(DataSource.scala:709)
at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$15.apply(DataSource.scala:390)
at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$15.apply(DataSource.scala:390)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
at scala.collection.immutable.List.foreach(List.scala:381)
at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
at scala.collection.immutable.List.flatMap(List.scala:344)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:389)
at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:239)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:227)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:174)
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:745)
在早期版本的PySpark(2.2.0)中,我可以使用以下jar:
hadoop-aws-2.7.3.jar
和aws-java-sdk-1.7.4.jar
我在命令行上将其作为参数传递给PySpark。这些似乎不适用于最新版本的PySpark(2.3.2)
我找到了此文档: https://spark.apache.org/docs/2.3.2/cloud-integration.html
这建议我应该使用hadoop-cloud_2.11
工件。我尝试通过以下方式传递给pyspark:
pyspark --packages org.apache.spark:hadoop-cloud_2.11:2.3.2
但是PySpark无法找到指定的程序包,并且出现此错误:
module not found: org.apache.spark#hadoop-cloud_2.11;2.3.2
我不确定如何继续。我可以尝试使用hadoop-aws和aws-java-sdk jar,但是我不确定哪个版本与PySpark 2.3.2兼容。
感谢您的帮助!