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https://issues.apache.org/jira/browse/SOLR-6203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15607409#comment-15607409
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Judith Silverman commented on SOLR-6203:
----------------------------------------
Christine, thanks for taking an interest in SOLR-6203. I will be happy to lend
a pair of eyes but it will take a while for me to remind myself how the patch
worked and to catch up with the changes to Solr since 4.10. I do have some
elementary questions about the patch for SOLR-9660 which I will post under that
jira. Thanks again.
> cast exception while searching with sort function and result grouping
> ---------------------------------------------------------------------
>
> Key: SOLR-6203
> URL: https://issues.apache.org/jira/browse/SOLR-6203
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 4.7, 4.8
> Reporter: Nate Dire
> Assignee: Christine Poerschke
> Attachments: README, SOLR-6203-unittest.patch,
> SOLR-6203-unittest.patch, SOLR-6203.patch
>
>
> After upgrading from 4.5.1 to 4.7+, a schema including a {{"*"}} dynamic
> field as text gets a cast exception when using a sort function and result
> grouping.
> Repro (with example config):
> # Add {{"*"}} dynamic field as a {{TextField}}, eg:
> {noformat}
> <dynamicField name="*" type="text_general" multiValued="true" />
> {noformat}
> # Create sharded collection
> {noformat}
> curl
> 'http://localhost:8983/solr/admin/collections?action=CREATE&name=test&numShards=2&maxShardsPerNode=2'
> {noformat}
> # Add example docs (query must have some results)
> # Submit query which sorts on a function result and uses result grouping:
> {noformat}
> {
> "responseHeader": {
> "status": 500,
> "QTime": 50,
> "params": {
> "sort": "sqrt(popularity) desc",
> "indent": "true",
> "q": "*:*",
> "_": "1403709010008",
> "group.field": "manu",
> "group": "true",
> "wt": "json"
> }
> },
> "error": {
> "msg": "java.lang.Double cannot be cast to
> org.apache.lucene.util.BytesRef",
> "code": 500
> }
> }
> {noformat}
> Source exception from log:
> {noformat}
> ERROR - 2014-06-25 08:10:10.055; org.apache.solr.common.SolrException;
> java.lang.ClassCastException: java.lang.Double cannot be cast to
> org.apache.lucene.util.BytesRef
> at
> org.apache.solr.schema.FieldType.marshalStringSortValue(FieldType.java:981)
> at org.apache.solr.schema.TextField.marshalSortValue(TextField.java:176)
> at
> org.apache.solr.search.grouping.distributed.shardresultserializer.SearchGroupsResultTransformer.serializeSearchGroup(SearchGroupsResultTransformer.java:125)
> at
> org.apache.solr.search.grouping.distributed.shardresultserializer.SearchGroupsResultTransformer.transform(SearchGroupsResultTransformer.java:65)
> at
> org.apache.solr.search.grouping.distributed.shardresultserializer.SearchGroupsResultTransformer.transform(SearchGroupsResultTransformer.java:43)
> at
> org.apache.solr.search.grouping.CommandHandler.processResult(CommandHandler.java:193)
> at
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:340)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> ...
> {noformat}
> It looks like {{serializeSearchGroup}} is matching the sort expression as the
> {{"*"}} dynamic field, which is a TextField in the repro.
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