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https://issues.apache.org/jira/browse/SOLR-3215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13280455#comment-13280455
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Mark Miller commented on SOLR-3215:
-----------------------------------

bq. one way to avoid this would be to stop treating the "local" replica as 
special

Just to point out explicitly: currently we have to offer this (local is 
special) as well though - it's a requirement for our current 'super safe' mode 
that we add locally first. So unless we also address some other issues, we'd 
have to allow things to happen both ways.


                
> We should clone the SolrInputDocument before adding locally and then send 
> that clone to replicas.
> -------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-3215
>                 URL: https://issues.apache.org/jira/browse/SOLR-3215
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>             Fix For: 4.0
>
>         Attachments: SOLR-3215.patch
>
>
> If we don't do this, the behavior is a little unexpected. You cannot avoid 
> having other processors always hit documents twice unless we support using 
> multiple update chains. We have another issue open that should make this 
> better, but I'd like to do this sooner than that. We are going to have to end 
> up cloning anyway when we want to offer the ability to not wait for the local 
> add before sending to replicas.
> Cloning with the current SolrInputDocument, SolrInputField apis is a little 
> scary - there is an Object to contend with - but it seems we can pretty much 
> count on that being a primitive that we don't have to clone?

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