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https://issues.apache.org/jira/browse/SOLR-12248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16678061#comment-16678061
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Munendra S N commented on SOLR-12248:
-------------------------------------
[^SOLR-12248.patch]
[~erickerickson]
This is because in case of BoolField and StrField default createField is
called. The method returns null when stored=false and indexed=false,
{code:java}
https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/schema/FieldType.java#L269
{code}
Hence, using createFields instead of createField as this handles docValues=true
case. I'm not sure when can creatdFields would return an empty list while doing
grouping.
> 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: Erick Erickson
> Priority: Minor
> Attachments: 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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