hadoop - AWS EMR 4.0 - 如何添加自定义 JAR 步骤以运行 shell 命令

Question

我正在尝试使用 EMR 4.0.0 上的步骤运行 shell 命令，并使用此链接作为引用 - http://docs.aws.amazon.com/ElasticMapReduce/latest/DeveloperGuide/emr-hadoop-script.html

但我想知道从何处将“command-runner.jar”放入“JAR 位置”字段 http://i.stack.imgur.com/CRicz.png

我在 AWS s3 中保留了“command-runner.jar”并尝试从该位置加载它，在“参数”中给出了我的“example.sh”文件的 s3 位置，在添加步骤后它失败并给出了这个异常

Exception in thread "main" java.lang.RuntimeException: java.io.IOException: Cannot run program "s3://<path>/example.sh" (in directory "."): error=2, No such file or directory
    at com.amazonaws.emr.command.runner.ProcessRunner.exec(ProcessRunner.java:139)
    at com.amazonaws.emr.command.runner.CommandRunner.main(CommandRunner.java:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.io.IOException: Cannot run program "s3://<path>/example.sh" (in directory "."): error=2, No such file or directory
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
    at com.amazonaws.emr.command.runner.ProcessRunner.exec(ProcessRunner.java:92)
    ... 7 more
Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:187)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
    ... 8 more

Answer 1

要运行存储在 S3 中的 shell 脚本，请使用 script-runner.jar，它位于 s3://elasticmapreduce/libs/script-runner/script-runner.jar 。

command-runner.jar 仅适用于本地文件。