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https://issues.apache.org/jira/browse/SOLR-9622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16909968#comment-16909968
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Munendra S N commented on SOLR-9622:
For [explain] to work, {{query}} obj has to be accessible/available, code
[link|https://github.com/apache/lucene-solr/blob/54ab07718a016c888e69ff4a8070c24cf34d3a51/solr/core/src/java/org/apache/solr/response/transform/ExplainAugmenterFactory.java#L107]
This happens when writing {{doclist}} in response Writer -
[link|https://github.com/apache/lucene-solr/blob/54ab07718a016c888e69ff4a8070c24cf34d3a51/solr/core/src/java/org/apache/solr/response/TextResponseWriter.java#L139].
In case of grouping, doclist is produced.
[explain] works with grouping when {{distrib=true}}, as execution flow is
entirely different. In single node setup, [explain] works when
{{group.main=true}} due to
[this|https://github.com/apache/lucene-solr/blob/54ab07718a016c888e69ff4a8070c24cf34d3a51/solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java#L1468]
There could be multiple ways to fix
* handle other group formats similar to {{group.main=true}}, so that
{{ResultContext}} is produced from grouping.
* Make query available to response writer(either via rb or directly)
but I don't think either approach is proper or straight-forward
> ExplainAugmenterFactory does not work on grouped queries
>
>
> Key: SOLR-9622
> URL: https://issues.apache.org/jira/browse/SOLR-9622
> Project: Solr
> Issue Type: Bug
> Components: search
>Reporter: Henrik
>Priority: Major
>
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