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https://issues.apache.org/jira/browse/HADOOP-19295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17887670#comment-17887670
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ASF GitHub Bot commented on HADOOP-19295:
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steveloughran merged PR #7100:
URL: https://github.com/apache/hadoop/pull/7100
> S3A: fs.s3a.connection.request.timeout too low for large uploads over slow
> links
> --------------------------------------------------------------------------------
>
> Key: HADOOP-19295
> URL: https://issues.apache.org/jira/browse/HADOOP-19295
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0, 3.4.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
>
> The value of {{fs.s3a.connection.request.timeout}} (default = 60s} is too low
> for large uploads over slow connections.
> I suspect something changed between the v1 and v2 SDK versions so that put
> was exempt from the normal timeouts, It is not and now surfaces in failures
> to upload 1+ GB files over slower network connections. Smailer (for example
> 128 MB) files work.
> The parallel queuing of writes in the S3ABlockOutputStream is helping create
> this problem as it queues multiple blocks at the same time, so per-block
> bandwidth becomes available/blocks ; four blocks cuts the capacity down by a
> quarter.
> The fix is straightforward: use a much bigger timeout. I'm going to propose
> 15 minutes. We need to strike a balance between upload time allocation and
> other requests timing out.
> I do worry about other consequences; we've found that timeout exception happy
> to hide the underlying causes of retry failures -so in fact this may be
> better for all but a server hanging after the HTTP request is initiated.
> too bad we can't alter the timeout for different requests
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