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https://issues.apache.org/jira/browse/SOLR-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16923921#comment-16923921
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David Smiley commented on SOLR-13738:
-------------------------------------
Likely caused by LUCENE-8848. Ironically the goal of that one is to highlight
more query types, so it's a bit odd that in this case, it did just the
opposite. Based on the stack trace, it appears what might help is passing the
SolrIndexSearcher that UnifiedHighlighter has into UHComponents where the
FieldOffsetStrategy could grab it instead of creating a new IndexSearcher. All
this said, I do wonder how/why it worked before. An investigation for another
day.
In the mean time, you might avoid this error by toggling some settings like not
using the weight matcher mode.
> UnifiedHighlighter can't highlight GraphQuery
> ---------------------------------------------
>
> Key: SOLR-13738
> URL: https://issues.apache.org/jira/browse/SOLR-13738
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 8.2
> Reporter: Jochen Barth
> Priority: Major
>
> Mikhail Khludnev said, this is a bug;
> Here the complete error message for the Query below:
> Just tested wirth 8.1.1: works.
> {quote}
> 2019-08-30 12:40:40.476 ERROR (qtp2116511124-65) [ x:Suchindex]
> o.a.s.h.RequestHandlerBase java.lang.ClassCastException: class
> org.apache.lucene.search.IndexSearcher cannot be cast to class
> org.apache.solr.search.SolrIndexSearcher (or
> g.apache.lucene.search.IndexSearcher and
> org.apache.solr.search.SolrIndexSearcher are in unnamed module of loader
> org.eclipse.jetty.webapp.WebAppClassLoader @5ed190be)
> at
> org.apache.solr.search.join.GraphQuery.createWeight(GraphQuery.java:115)
> at
> org.apache.lucene.search.uhighlight.FieldOffsetStrategy.createOffsetsEnumsWeightMatcher(FieldOffsetStrategy.java:137)
> at
> org.apache.lucene.search.uhighlight.FieldOffsetStrategy.createOffsetsEnumFromReader(FieldOffsetStrategy.java:74)
> at
> org.apache.lucene.search.uhighlight.MemoryIndexOffsetStrategy.getOffsetsEnum(MemoryIndexOffsetStrategy.java:110)
> at
> org.apache.lucene.search.uhighlight.FieldHighlighter.highlightFieldForDoc(FieldHighlighter.java:76)
> at
> org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFieldsAsObjects(UnifiedHighlighter.java:641)
> at
> org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFields(UnifiedHighlighter.java:510)
> at
> org.apache.solr.highlight.UnifiedSolrHighlighter.doHighlighting(UnifiedSolrHighlighter.java:149)
> at
> org.apache.solr.handler.component.HighlightComponent.process(HighlightComponent.java:171)
> 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)
> {quote}
> Here the Query raising this error:
> {quote}
> start=0&rows=50&sort=sort_title_s%20asc&fl=id&facet=true&facet.mincount=1&facet.field=type_s&facet.field=meta_name_ss&facet.field=meta_periodical_title_s&facet.field=meta_subject_ss&facet.range=meta_date_dtrs&f.meta_date_
> dtrs.facet.range.start=0000-01-01T00%3A00%3A00Z&f.meta_date_dtrs.facet.range.end=2100-01-01T00%3A00%3A00Z&f.meta_date_dtrs.facet.range.gap=%2B1YEAR&json={"query":{"bool":{"must":[{"bool":{"must":["sort_shelflocator_s:cod\
> \ pal\\ lat\\
> 00*"],"should":[{"graph":{"from":"parent_ids","query":"parent_ids:\"/digi.ub.uni-heidelberg.de/collection/sammlung51\"","to":"id"}},{"graph":{"from":"parent_ids","query":"parent_ids:\"/digi.ub.uni-heidelberg
> .de/collection/sammlung52\"","to":"id"}}]}},"class_s:meta"],"must_not":[{"join":{"from":"id","query":{"bool":{"must":[{"bool":{"must":["sort_shelflocator_s:cod\\
> pal\\ lat\\ 00*"],"should":[{"graph":{"from":"parent_ids","
> query":"parent_ids:\"/digi.ub.uni-heidelberg.de/collection/sammlung51\"","to":"id"}},{"graph":{"from":"parent_ids","query":"parent_ids:\"/digi.ub.uni-heidelberg.de/collection/sammlung52\"","to":"id"}}]}},"class_s:meta"]}}
> ,"to":"parent_ids"}}]}}}
> {quote}
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