[jira] [Created] (SOLR-13906) ClassCastException in Group Sort when 'score' field in fl

["Arpit Jain (Jira)" <ji...@apache.org>]

Arpit Jain created SOLR-13906:
---------------------------------

             Summary: ClassCastException in Group Sort when 'score' field in fl
                 Key: SOLR-13906
                 URL: https://issues.apache.org/jira/browse/SOLR-13906
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrCloud
    Affects Versions: 8.2
         Environment: Solr Version: 8.2.0
JDK 11
Cluster Setup: 2 Shards with 2 nodes each
            Reporter: Arpit Jain


When running a group query with group sort, and passing 'score' field in fl list, I am getting the following exception. 

Sample Query which is failing :  [http://localhost:8983/solr/collection1/select?fl=field1,score&group.query=field2:(]"ABC")&q=*:*&group.sort=field3+desc&group=true&_route_=shard1

Removing score from fl fixes the error. 


{code:java}
2019-11-05 10:46:50.604 ERROR (qtp1527007086-84) [c:sprod s:2297 r:core_node110 x:sprod_2297_replica_n109] o.a.s.h.RequestHandlerBase java.lang.ClassCastException: class org.apache.lucene.search.MultiCollector cannot be cast to class org.apache.lucene.search.TopDocsCollector (org.apache.lucene.search.MultiCollector and org.apache.lucene.search.TopDocsCollector are in unnamed module of loader org.eclipse.jetty.webapp.WebAppClassLoader @757f675c)
at org.apache.solr.search.Grouping$CommandQuery.finish(Grouping.java:890)
at org.apache.solr.search.Grouping.execute(Grouping.java:407)
at org.apache.solr.handler.component.QueryComponent.doProcessGroupedSearch(QueryComponent.java:1458)
at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:390)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:305)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:2578)
at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:780)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:566)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:423)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:350)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1711)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1347)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1678)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1249)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:152)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:505)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:781)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:917)
at java.base/java.lang.Thread.run(Thread.java:834){code}



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