Steve Loughran commented on HADOOP-15076:

patch 006: 
* pull out AccessDenied into its own section, 
* fix performance ToC
* pull in more stacks and explanations, from other JIRAs

> Enhance s3a troubleshooting docs, add perf section
> --------------------------------------------------
>                 Key: HADOOP-15076
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15076
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: documentation, fs/s3
>    Affects Versions: 2.8.2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Blocker
>         Attachments: HADOOP-15076-001.patch, HADOOP-15076-002.patch, 
> HADOOP-15076-003.patch, HADOOP-15076-004.patch, HADOOP-15076-005.patch, 
> HADOOP-15076-006.patch
> A recurrent theme in s3a-related JIRAs, support calls etc is "tried upgrading 
> the AWS SDK JAR and then I got the error ...". We know here "don't do that", 
> but its not something immediately obvious to lots of downstream users who 
> want to be able to drop in the new JAR to fix things/add new features
> We need to spell this out quite clearlyi "you cannot safely expect to do 
> this. If you want to upgrade the SDK, you will need to rebuild the whole of 
> hadoop-aws with the maven POM updated to the latest version, ideally 
> rerunning all the tests to make sure something hasn't broken. 
> Maybe near the top of the index.md file, along with "never share your AWS 
> credentials with anyone"

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