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https://issues.apache.org/jira/browse/SOLR-6712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14481246#comment-14481246
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Elaine Cario commented on SOLR-6712:
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Problem seems to be in QueryComponent.groupedFinishStage, where it empties out
the resultIds map if mergedTopGroups is empty. The problem is that on a
group.query, mergedTopGroups is empty, but mergedQueryCommandResults is not.
The HighlightComponent uses resultIds map, and NPE's ensue if that is empty.
I'm working on a patch (it's a pretty straightforward fix).
There is another issue with grouped query results, in that the scores are not
present in the documents coming from the shard responses. This isn't a big
issue, as the documents appear to be sorted correctly, but I was getting errors
not ony if I didn't specify a sort explicitly, but also needed a secondary sort
field as well. I'll open a separate JIRA for that also.
> Highlighting not working in solr cloud grouping query when using
> group.query=xxx
> --------------------------------------------------------------------------------
>
> Key: SOLR-6712
> URL: https://issues.apache.org/jira/browse/SOLR-6712
> Project: Solr
> Issue Type: Bug
> Components: highlighter
> Affects Versions: 4.10.2
> Reporter: Timo Schmidt
>
> The highlighting is throwing an exception in sold cloud when you are using
> group.query. Example:
> /select?group=true&group.query=livesuggesttype_s:game_movie&hl=true&hl.q=test&hl.fl=content
> The following exception will be throwen:
> java.lang.NullPointerException
> at
> org.apache.solr.handler.component.HighlightComponent.finishStage(HighlightComponent.java:195)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:330)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:1983)
> at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:760)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:412)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> at org.eclipse.jetty.server.Server.handle(Server.java:368)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
> at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
> at
> org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> at java.lang.Thread.run(Thread.java:745)
> I think this is also mentioned in the following stackoverflow post:
> http://stackoverflow.com/questions/25548063/solr-search-with-multicore-grouping-highlighting-null-pointer
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