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https://issues.apache.org/jira/browse/LUCENE-5680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14007092#comment-14007092
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Robert Muir commented on LUCENE-5680:
-------------------------------------

I'm gonna restate: I don't think we should allow updating values to missing.

There is no real use case for this, and it is absurdly complicated (it has 
completely hijacked this issue).

> Allow updating multiple DocValues fields atomically
> ---------------------------------------------------
>
>                 Key: LUCENE-5680
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5680
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: core/index
>            Reporter: Shai Erera
>            Assignee: Shai Erera
>         Attachments: LUCENE-5680.patch, LUCENE-5680.patch, LUCENE-5680.patch
>
>
> This has come up on the list (http://markmail.org/message/2wmpvksuwc5t57pg) 
> -- it would be good if we can allow updating several doc-values fields, 
> atomically. It will also improve/simplify our tests, where today we index two 
> fields, e.g. the field itself and a control field. In some multi-threaded 
> tests, since we cannot be sure which updates came through first, we limit the 
> test such that each thread updates a different set of fields, otherwise they 
> will collide and it will be hard to verify the index in the end.
> I was working on a patch and it looks pretty simple to do, will post a patch 
> shortly.



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