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https://issues.apache.org/jira/browse/LUCENE-2956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019019#comment-13019019
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Michael Busch commented on LUCENE-2956:
---------------------------------------
Cool patch! :)
Though it worries me a little how complex the whole delete/update logic is
becoming (not only the part this patch adds).
Originally we decided to not go with sequenceIDs partly because we thought the
implementation might be too complex, but I think it'd be simpler than the
current approach that uses bits.
The sequenceIDs approach we had in the beginning was also completely lockless
in a very very simple way.
Anyway, I have yet to take a closer look here. Just something that might be
worth discussing.
> Support updateDocument() with DWPTs
> -----------------------------------
>
> Key: LUCENE-2956
> URL: https://issues.apache.org/jira/browse/LUCENE-2956
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: Realtime Branch
> Reporter: Michael Busch
> Assignee: Simon Willnauer
> Priority: Minor
> Fix For: Realtime Branch
>
> Attachments: LUCENE-2956.patch
>
>
> With separate DocumentsWriterPerThreads (DWPT) it can currently happen that
> the delete part of an updateDocument() is flushed and committed separately
> from the corresponding new document.
> We need to make sure that updateDocument() is always an atomic operation from
> a IW.commit() and IW.getReader() perspective. See LUCENE-2324 for more
> details.
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