[jira] [Commented] (HADOOP-5836) Bug in S3N handling of directory markers using an object with a trailing "/" causes jobs to fail

["Jagane Sundar (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-5836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222597#comment-13222597 ] 

Jagane Sundar commented on HADOOP-5836:
---------------------------------------

A note on running the unit test for this (and possibly other s3/s3n driver patches):
The name of the unit test is Jets3tNativeS3FileSystemContractTest and it is run using the command:

$ ant -Dtestcase=Jets3tNativeS3FileSystemContractTest test-core

To run this unit test, you need to add your own S3 credentials to the file src/test/core-site.xml. Edit src/test/core-site.xml and add details of a test s3 and a test s3n filesystems for the test, as shown below. In this example, you need to replace AAAAAAAAAAAAAAAAAAA:bbbbbbbbbbbbbbbbbbbbb with urlencoded versions of your S3 access key id, and secret access key. Use the program urlencode on linux to urlencode.

<property>
  <name>test.fs.s3n.name</name>
  <value>s3n://AAAAAAAAAAAAAAAAAAA:bbbbbbbbbbbbbbbbbbbbb@yourbucketname</value>
  <description>The name of the s3n file system for testing.</description>
</property>

<property>
  <name>test.fs.s3.name</name>
  <value>s3://AAAAAAAAAAAAAAAAAAA:bbbbbbbbbbbbbbbbbbbbb@yourbucketname</value>
  <description>The name of the s3 file system for testing.</description>
</property>



                
> Bug in S3N handling of directory markers using an object with a trailing "/" causes jobs to fail
> ------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5836
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5836
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 0.18.3
>            Reporter: Ian Nowland
>            Assignee: Ian Nowland
>             Fix For: 0.21.0
>
>         Attachments: HADOOP-5836-0-for_branch_1_0.patch, HADOOP-5836-0.patch, HADOOP-5836-2.patch
>
>
> Some tools which upload to S3 and use a object terminated with a "/" as a directory marker, for instance "s3n://mybucket/mydir/". If asked to iterate that "directory" via listStatus(), then the current code will return an empty file "", which the InputFormatter happily assigns to a split, and which later causes a task to fail, and probably the job to fail. 

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