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https://issues.apache.org/jira/browse/HADOOP-14283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043570#comment-16043570
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Aaron Fabbri commented on HADOOP-14283:
---------------------------------------

Thanks [~liuml07].  I ran into the same problem when testing with S3Guard.  I 
ended up using a ranged version for it, as I found it hard to find the list of 
dynamodblocal releases:

{code}
<dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>DynamoDBLocal</artifactId>
        <version>[1.11.86,2.0)</version>
      </dependency>
{code}

> Upgrade AWS SDK to 1.11.134
> ---------------------------
>
>                 Key: HADOOP-14283
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14283
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Aaron Fabbri
>            Assignee: Aaron Fabbri
>            Priority: Critical
>             Fix For: 2.9.0, 3.0.0-alpha4
>
>         Attachments: HADOOP-14283.001.patch, ITestS3AConcurrentRename.java
>
>
> We hit a hang bug when testing S3A with parallel renames.  
> I narrowed this down to the newer AWS Java SDK.  It only happens under load, 
> and appears to be a failure to wake up a waiting thread on timeout/error.
> I've created a github issue here:
> https://github.com/aws/aws-sdk-java/issues/1102
> I can post a Hadoop scale test which reliably reproduces this after some 
> cleanup.  I have posted an SDK-only test here which reproduces the issue 
> without Hadoop:
> https://github.com/ajfabbri/awstest
> I have a support ticket open and am working with Amazon on this bug so I'll 
> take this issue.



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