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https://issues.apache.org/jira/browse/SOLR-2894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14065598#comment-14065598
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Andrew Muldowney commented on SOLR-2894:
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So I may have jumped the gun on the fix. Previously refinement requests would
return counts of zero for things that it was asked about but had no values for,
this is now no longer true. (It shrinks the required work to merge in
refinements and limits how much data we send across the wire). This means that
we cannot ask if a refinement has been fulfilled because if a shard doesn't
know about a valuePath it will not include it in its response.
If the shard is responding properly it *should* still return a {{facet_pivot}}
with the top level requested pivots, just with everything below that merely an
empty list.
So really the only thing we can check is that the {{facet_pivot}} isn't null on
a response, since that would indicate that something really awful happened.
> Implement distributed pivot faceting
> ------------------------------------
>
> Key: SOLR-2894
> URL: https://issues.apache.org/jira/browse/SOLR-2894
> Project: Solr
> Issue Type: Improvement
> Reporter: Erik Hatcher
> Assignee: Hoss Man
> Fix For: 4.9, 5.0
>
> Attachments: SOLR-2894-mincount-minification.patch,
> SOLR-2894-reworked.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch,
> SOLR-2894_cloud_test.patch, dateToObject.patch, pivot_mincount_problem.sh
>
>
> Following up on SOLR-792, pivot faceting currently only supports
> undistributed mode. Distributed pivot faceting needs to be implemented.
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