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https://issues.apache.org/jira/browse/HADOOP-6254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759163#action_12759163
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Tom White commented on HADOOP-6254:
-----------------------------------

Thanks for the detailed explanation, Andrew. This looks good to me. I had 
couple of small comments:

* Do we need to catch all IOExceptions, or would SocketTimeoutException and 
SocketException meet the needs of this issue?
* Minor nit: would be nice to explain in a comment where 144 comes from in the 
test (128 + 16).



> s3n fails with SocketTimeoutException
> -------------------------------------
>
>                 Key: HADOOP-6254
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6254
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 0.18.3, 0.19.2, 0.20.1
>            Reporter: Andrew Hitchcock
>            Assignee: Andrew Hitchcock
>         Attachments: HADOOP-6254.diff, HADOOP-6254.diff
>
>
> If a user's map function is CPU intensive and doesn't read from the input 
> very quickly, compounded by the buffering of input, then S3 might think the 
> connection has been lost and will close the connection. Then when the user 
> attempts to read from the input again, they'll receive a 
> SocketTimeoutException and the task will fail.

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