Amazon s3 Spark s3读取提供NullPointerException

我正在尝试处理来自S3文件系统的文件。我已经导出了

AWS\u访问密钥\u ID

和

AWS\u SECRET\u访问密钥

。我还设置了配置

hadoopConf.set("fs.s3.awsAccessKeyId","<key>")  
hadoopConf.set("fs.s3.awsSecretAccessKey","<secret>")

build.sbtMy build.sbt具有以下依赖项

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.5.1"

libraryDependencies += "org.apache.hadoop" % "hadoop-client" % "2.4.0"

libraryDependencies += "net.java.dev.jets3t" % "jets3t" % "0.9.3"

我使用AWS IAM作为访问密钥。我错过什么了吗

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任何帮助都将不胜感激。

如果没有更多细节，我将盲目射击，并说您的URI路径无效。

这是一个错误

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.5.1"

libraryDependencies += "org.apache.hadoop" % "hadoop-client" % "2.4.0"

libraryDependencies += "net.java.dev.jets3t" % "jets3t" % "0.9.3"