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https://issues.apache.org/jira/browse/HADOOP-16921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17090707#comment-17090707
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Steve Loughran commented on HADOOP-16921:
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happy for you to take up.
* anything related to mark/position in the AWS SDK is usually caused by upload
failures and retries, usually very intermittent and so hard o track down.
* I'd start with adding some verifyOpen() checks on this and related methods,
and add a check for the argument being null. Maybe a null pointer came back
from the bytebuffer factory in some failure mode
> NPE in s3a byte buffer block upload
> -----------------------------------
>
> Key: HADOOP-16921
> URL: https://issues.apache.org/jira/browse/HADOOP-16921
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Priority: Minor
>
> NPE in s3a upload when fs.s3a.fast.upload.buffer = bytebuffer
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