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https://issues.apache.org/jira/browse/HADOOP-19317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17893560#comment-17893560
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ASF GitHub Bot commented on HADOOP-19317:
-----------------------------------------

steveloughran opened a new pull request, #7134:
URL: https://github.com/apache/hadoop/pull/7134

   Option fs.s3a.connection.expect.continue controlsa
   whether or not an HTTP PUT request to the S3 store Sets the Expect: 
100-continue
   header and awaits a 100 CONTINUE response
   from the server before uploading any data.
   
   This allows for throttling and other problems
   to be detected fast.
   
   The default is "true".
   This has long been the implicit setting;
   this change simply allows callers to disable it.
   
   Change-Id: Ib21d2511db356c1b5781fc6b6531cb9282c3504c
   
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> S3A: export all http connection settings as configuration options
> -----------------------------------------------------------------
>
>                 Key: HADOOP-19317
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19317
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.4.1
>            Reporter: Steve Loughran
>            Priority: Major
>
> There are a few extras settings for httpclient which can be passed down to 
> the aws client configuration: expect-continue, tcp keepalive &more.
> Make them *all* configurable through fs.s3a options



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