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https://issues.apache.org/jira/browse/PHOENIX-5881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192964#comment-17192964
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Josh Elser commented on PHOENIX-5881:
-------------------------------------

{quote}the logic is basically saying "if the timestamp is super-high, that 
means Tephra's running this Scan, so don't mess with how HBase treats delete 
markers."
{quote}
Thanks Geoffrey. The assumption here is that folks don't write timestamps in 
the future for HBase. Generally, I think that sounds appropriate, but it would 
be good to write that down somewhere. It looks like the 1.1x is about 5 years 
in the future, so probably low risk :)

I can't find the re-kicked job I tried to launch. Reattaching v3 again.

> Port MaxLookbackAge logic to 5.x
> --------------------------------
>
>                 Key: PHOENIX-5881
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5881
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Geoffrey Jacoby
>            Assignee: Geoffrey Jacoby
>            Priority: Blocker
>             Fix For: 5.1.0
>
>         Attachments: PHOENIX-5881.v1.patch, PHOENIX-5881.v2.patch, 
> PHOENIX-5881.v3.patch, PHOENIX-5881.v4.patch
>
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> PHOENIX-5645 wasn't included in the master (5.x) branch because an HBase 2.x 
> change prevented the logic from being useful in the case of deletes, since 
> HBase 2.x no longer allows us to show deleted cells on an SCN query before 
> the point of deletion. Unfortunately, PHOENIX-5645 wound up requiring a lot 
> of follow-up work in the IndexTool and IndexScrutinyTool to deal with its 
> implications, and because of that, the 4.x and 5.x codebases around indexes 
> have diverged a good bit. 
> This work item is to get them back in sync, even though the behavior in the 
> face of deletes will be somewhat different, and so most likely some tests 
> will have to be changed or Ignored. 



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