使用distcp和s3distcp与输出到HDFS的EMR作业使用的问题

我已经在AWS的EMR上运行作业，并将输出存储在EMR作业的HDFS中。然后我尝试通过distcp或s3distcp将结果复制到S3，但两者都失败，如下所述。（注：原因我不只是直接送我的EMR作业的输出S3是由于（目前未解决）问题我在Where is my AWS EMR reducer output for my completed job (should be on S3, but nothing there)?使用distcp和s3distcp与输出到HDFS的EMR作业使用的问题

对于DistCp使用说明，我跑（以下this post's recommendation）：

elastic-mapreduce --jobflow <MY-JOB-ID> --jar \ 
s3://elasticmapreduce/samples/distcp/distcp.jar \ 
    --args -overwrite \ 
    --args hdfs:///output/myJobOutput,s3n://output/myJobOutput \ 
    --step-name "Distcp output to s3"

在错误日志（到/ mnt /无功/日志/的Hadoop /步/ 8），我得到：

With failures, global counters are inaccurate; consider running with -i 
Copy failed: Status Code: 403, AWS Service: Amazon S3, AWS Request ID: <SOME-REQUEST-ID>, AWS Error Code: null, AWS Error Message: Forbidden, S3 Extended Request ID: <SOME-EXT-REQUEST-ID> 
     at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:548) 
     at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:288) 
     at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:170) 
...

对于s3distcp，我运行（以下the s3distcp documentation）：

elastic-mapreduce --jobflow <MY-JOB-ID> --jar \ 
s3://us-east-1.elasticmapreduce/libs/s3distcp/1.0.4/s3distcp.jar \ 
--args '--src,/output/myJobOutput,--dest,s3n://output/myJobOutput'

在错误日志中（到/ mnt /无功/日志/的Hadoop /步/ 9），我得到：

java.lang.RuntimeException: Reducer task failed to copy 1 files: hdfs://10.116.203.7:9000/output/myJobOutput/part-00000 etc 
     at com.amazon.elasticmapreduce.s3distcp.CopyFilesReducer.close(Unknown Source) 
     at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:537) 
     at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:428) 
     at org.apache.hadoop.mapred.Child$4.run(Child.java:255) 
     at java.security.AccessController.doPrivileged(Native Method) 
     at javax.security.auth.Subject.doAs(Subject.java:396) 
     at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059) 
     at org.apache.hadoop.mapred.Child.main(Child.java:249)

任何想法我做错了吗？

更新：有人响应在AWS论坛为post about a similar distcp error提到的IAM用户的用户权限， ~~，但我不知道这是什么意思~~ （编辑：我还没有创建任何IAM用户，所以它使用默认值）;希望它有助于查明我的问题。

更新2：我注意到在NameNode的日志文件中这个错误..我要去寻找到默认EMR权限，看它是否是我的问题（当重新运行s3distcp）：

2012-06-24 21:57:21,326 WARN org.apache.hadoop.security.ShellBasedUnixGroupsMapping (IPC Server handler 40 on 9000): got exception trying to get groups for user job_201206242009_0005 
org.apache.hadoop.util.Shell$ExitCodeException: id: job_201206242009_0005: No such user 

    at org.apache.hadoop.util.Shell.runCommand(Shell.java:255) 
    at org.apache.hadoop.util.Shell.run(Shell.java:182) 
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:375) 
    at org.apache.hadoop.util.Shell.execCommand(Shell.java:461) 
    at org.apache.hadoop.util.Shell.execCommand(Shell.java:444) 
    at org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getUnixGroups(ShellBasedUnixGroupsMapping.java:68) 
    at org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getGroups(ShellBasedUnixGroupsMapping.java:45) 
    at org.apache.hadoop.security.Groups.getGroups(Groups.java:79) 
    at org.apache.hadoop.security.UserGroupInformation.getGroupNames(UserGroupInformation.java:966) 
    at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.<init>(FSPermissionChecker.java:50) 
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5160) 
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkTraverse(FSNamesystem.java:5143) 
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:1992) 
    at org.apache.hadoop.hdfs.server.namenode.NameNode.getFileInfo(NameNode.java:837) 
    ...

更新3：我联系AWS Support，他们没有看到问题，所以我现在正等待他们的工程团队回来。我会听到更多回复

来源

2012-06-24 Dolan Antenucci