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https://issues.apache.org/jira/browse/SOLR-6203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914493#comment-16914493
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Christine Poerschke commented on SOLR-6203:
-------------------------------------------
Hmm, so first I tried to resume work from the
https://github.com/jitka18/lucene-solr/tree/jira/solr-6203 working branch but
struggled with that because since then (May 2017) many things changed,
understandably so, and refactoring changes (e.g. SOLR-10990 and SOLR-13585 and
SOLR-13603) can be helpful for code readability etc. but can be tough to
conflict resolve on git merge etc.
Anyway, so then I've used
https://github.com/apache/lucene-solr/compare/master...jitka18:jira/solr-6203
as a reference and the patch just attached contains, I think, most (but not
all) of the changes e.g. the SolrIndexSearcher change is missing and also the
test changes are not yet transplanted.
With hindsight, perhaps the tests should have been revived first actually *to
determine if and how this is still an issue with the 8.x Solr series* ... ?
----
PS: Why the switch back from git branch to patch file? Just small personal
preference in part plus we now have a Lucene/Solr QA bot setup which will
automatically provide patch feedback but the bot does not (yet) do the same for
pull requests.
PS PS: As always, any and all input and contributions appreciated here and if
git branches and pull requests instead of patch file attachments are more your
thing then absolutely please do feel free to choose that option.
> 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
> Priority: Major
> Attachments: README, SOLR-6203-unittest.patch,
> SOLR-6203-unittest.patch, SOLR-6203.patch, SOLR-6203.patch, SOLR-6203.patch,
> SOLR-6203.patch, SOLR-6203.patch, SOLR-6203.patch, SOLR-6203.patch,
> SOLR-6203.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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