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https://issues.apache.org/jira/browse/NIFI-9055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17400572#comment-17400572
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Joey Frazee commented on NIFI-9055:
-----------------------------------

S3 makes use of a range header following RFC 2616 [1] for doing a range 
request. AFAICT, specifying a range for a 0 byte file is invalid -- it does not 
"include[s] at least one byte-range-spec whose first-byte-pos is less than the 
current length of the entity-body" since 0 is not less than 0.

So, a range shouldn't be specified at all and we need a third branch in the 
code where we just skip the setRange() when the intent is 0-.

1. https://datatracker.ietf.org/doc/html/rfc2616#section-14.35.1

> FetchS3Object fails to fetch small files
> ----------------------------------------
>
>                 Key: NIFI-9055
>                 URL: https://issues.apache.org/jira/browse/NIFI-9055
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 1.14.0
>            Reporter: Joey Frazee
>            Priority: Major
>
> FetchS3Object fails to retrieve small or zero byte files returning: The 
> requested range is not satisfiable, Status Code: 416, Error Code: 
> InvalidRange.



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