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https://issues.apache.org/jira/browse/SOLR-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622860#comment-13622860
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Robert Muir commented on SOLR-3251:
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Its bugs of a different form.
If you make the schema mutable, then now you have a "mutable" Codec that
indexwriter is using. This could cause a lot of issues: there is a reason why
Codec is 'final' on indexwriter. Other similar strange bugs can suddenly pop
out, i'm just mentioning one.
I dont think the schema should be mutable. I think it would be less crazy if it
was already mutable, but given that its already immutable, if we want to make
this change then there needs to be a lot of review and discussion about what
*will* break.
as far as the issue being open for over a year with little discussion, i dont
care about that. yesterday a patch when up that made the schema mutable, where
the previous discussion before that patch indicated it might be copy-on-write
or something else (immutable). I saw yonik's comment yesterday about
immutability and started thinking about what all could go wrong here unless we
go that route (it seems to me: a lot).
I figured yesterday i wouldnt need to comment, that the issue would probably go
that direction anyway. However today when you mentioned you wanted to commit
it, it surprised me, so i spoke up.
> dynamically add field to schema
> -------------------------------
>
> Key: SOLR-3251
> URL: https://issues.apache.org/jira/browse/SOLR-3251
> Project: Solr
> Issue Type: New Feature
> Reporter: Yonik Seeley
> Assignee: Steve Rowe
> Attachments: SOLR-3251.patch, SOLR-3251.patch
>
>
> One related piece of functionality needed for SOLR-3250 is the ability to
> dynamically add a field to the schema.
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