I would like to read Parquet data stored on S3 from PySpark.

I've downloaded spark from here:

http://www.apache.org/dist/spark/spark-2.1.0/spark-2.1.0-bin-hadoop2.7.tgz

And installed it to Python naively

cd python
python setup.py install

This seems to function fine and I can import pyspark, make a SparkContext, etc.. However when I go to read some publicly accessible parquet data I get the following:

import pyspark
sc = pyspark.SparkContext('local[4]')
sql = pyspark.SQLContext(sc)
df = sql.read.parquet('s3://bucket-name/mydata.parquet')

And I receive the following exception

Py4JJavaError: An error occurred while calling o55.parquet.
: java.io.IOException: No FileSystem for scheme: s3at 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$$anonfun$14.apply(DataSource.scala:372)at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$14.apply(DataSource.scala:370)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:370)at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:152)at org.apache.spark.sql.DataFrameReader.parquet(DataFrameReader.scala:441)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:280)at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)at py4j.commands.CallCommand.execute(CallCommand.java:79)at py4j.GatewayConnection.run(GatewayConnection.java:214)at java.lang.Thread.run(Thread.java:745)

This error pops up a bit from google searches. So far none of the solutions provided have been helpful.

I'm on Linux (Ubuntu 16.04) on a personal computer without much else installed (everything is pretty stock).

Update

I downgraded to http://www.apache.org/dist/spark/spark-2.1.0/spark-2.1.0-bin-hadoop2.4.tgz to have AWS included by default.

Now unfortunately my AWS credentials aren't being picked up. I've tried a few things:

1. Including them as SparkConf parameters

   conf = (pyspark.SparkConf().set('fs.s3.awsAccessKeyId', ...').set('fs.s3.awsSecretAccessKey', '...'))
   sc = pyspark.SparkContext('local[4]', conf=conf)
   

2. Including them in my local .aws/credentials file
3. Including them in the URL (doesn't work because my access key has a forward slash)

Unfortunately in all cases I receive a traceback like the following

IllegalArgumentException: 'AWS Access Key ID and Secret Access Key must be specified as the username or password (respectively) of a s3 URL, or by setting the fs.s3.awsAccessKeyId or fs.s3.awsSecretAccessKey properties (respectively).'

Using the Hadoop-2.4 build of the pre-built spark 2.X binary (which I believe ships with s3 functionality) you can programmatically configure spark to pull s3 data in the following manner:

import pyspark
conf = pyspark.SparkConf()sc = pyspark.SparkContext('local[4]', conf=conf)
sc._jsc.hadoopConfiguration().set("fs.s3n.awsAccessKeyId", "")
sc._jsc.hadoopConfiguration().set("fs.s3n.awsSecretAccessKey", "")sql = pyspark.SQLContext(sc)
df = sql.read.parquet('s3n://bucket-name/mydata.parquet')

A critical thing to note is the prefix s3n in both the URI for the bucket and the configuration name