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https://issues.apache.org/jira/browse/SOLR-16750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713399#comment-17713399
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Ishan Chattopadhyaya commented on SOLR-16750:
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Ouch! Both single and multi shard behaviour warrant a bugfix release. Can we
fix this by 9.2.1?
> Grouping on EnumFieldType fields fails
> --------------------------------------
>
> Key: SOLR-16750
> URL: https://issues.apache.org/jira/browse/SOLR-16750
> Project: Solr
> Issue Type: Bug
> Components: Grouping
> Reporter: Tomas Eduardo Fernandez Lobbe
> Priority: Minor
> Labels: newdev
> Time Spent: 10m
> Remaining Estimate: 0h
>
> For single shard collections, Solr responds with the enum index instead of
> the value. For multi-shard collections, Solr returns a 500 because internally
> it gets a ClassCastException such as:
> {noformat}
> java.lang.ClassCastException: class org.apache.solr.common.EnumFieldValue
> cannot be cast to class java.lang.Integer
> {noformat}
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