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https://issues.apache.org/jira/browse/SOLR-12248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16828788#comment-16828788
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ASF subversion and git services commented on SOLR-12248:
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Commit 4b49bd99ca20cee2263a3cd3c115c7d00b98f043 in lucene-solr's branch
refs/heads/master from Ishan Chattopadhyaya
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=4b49bd9 ]
SOLR-12248, SOLR-4647: Grouping is broken on docValues-only fields
> Grouping in SolrCloud fails if indexed="false" docValues="true" and
> stored="false"
> ----------------------------------------------------------------------------------
>
> Key: SOLR-12248
> URL: https://issues.apache.org/jira/browse/SOLR-12248
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 6.6.2
> Reporter: Erick Erickson
> Assignee: Ishan Chattopadhyaya
> Priority: Minor
> Attachments: SOLR-12248.patch, SOLR-12248.patch
>
>
> In SolrCloud _only_ (it works in stand-alone mode), a field defined as:
> <field name="boolean_mvn_in_dvy_sn" type="boolean" multiValued="false"
> indexed="false" docValues="true" stored="false" />
> will fail with the following error:
> java.lang.NullPointerException
> org.apache.solr.schema.BoolField.toExternal(BoolField.java:131)
> org.apache.solr.schema.BoolField.toObject(BoolField.java:142)
> org.apache.solr.schema.BoolField.toObject(BoolField.java:51)
> org.apache.solr.search.grouping.endresulttransformer.GroupedEndResultTransformer.transform(GroupedEndResultTransformer.java:72)
> org.apache.solr.handler.component.QueryComponent.groupedFinishStage(QueryComponent.java:830)
> org.apache.solr.handler.component.QueryComponent.finishStage(QueryComponent.java:793)
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:435)
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:173)
> .
> .
> curiously enough it succeeds with a field identically defined except for
> stored="true"
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