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https://issues.apache.org/jira/browse/SOLR-7879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660214#comment-14660214
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Yonik Seeley commented on SOLR-7879:
------------------------------------
OK, you can only sort on "index", "count", or a calculated metric in the
"facet" block.
So I'm assuming that the variable "sortCol" is one of avg_f1, avg_f2, unique_f3
But the problem here looks like sub_facet... it's sorting by "field3", but
there's no "field3" being calculated in that facet.
> Null pointer exception when
> ----------------------------
>
> Key: SOLR-7879
> URL: https://issues.apache.org/jira/browse/SOLR-7879
> Project: Solr
> Issue Type: Bug
> Components: Facet Module, search
> Affects Versions: 5.2.1
> Environment: Oracle jdk1.8
> Reporter: Gary Yang
> Labels: faceting, jsonapi, subfacet
>
> This can be reproduce by certain inputs, but I can't find a pattern in the
> inputs that cause this error:
> Caused by:
> org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error
> from server at http://192.168.1.47:8983/solr/core1:
> java.lang.NullPointerException
> at
> org.apache.solr.search.facet.FacetFieldProcessorFCBase.findTopSlots(FacetField.java:301)
> at
> org.apache.solr.search.facet.FacetFieldProcessorFCBase.getFieldCacheCounts(FacetField.java:254)
> at
> org.apache.solr.search.facet.FacetFieldProcessorFCBase.process(FacetField.java:218)
> at
> org.apache.solr.search.facet.FacetProcessor.processSubs(FacetRequest.java:267)
> at
> org.apache.solr.search.facet.FacetFieldProcessorNumeric.calcFacets(FacetFieldProcessorNumeric.java:472)
> at
> org.apache.solr.search.facet.FacetFieldProcessorNumeric.process(FacetFieldProcessorNumeric.java:151)
> at
> org.apache.solr.search.facet.FacetProcessor.processSubs(FacetRequest.java:267)
> at
> org.apache.solr.search.facet.FacetProcessor.fillBucket(FacetRequest.java:354)
> at
> org.apache.solr.search.facet.FacetQueryProcessor.process(FacetQuery.java:57)
> at org.apache.solr.search.facet.FacetModule.process(FacetModule.java:87)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:255)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2064)
> at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:654)
> at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:450)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
> at org.eclipse.jetty.server.Server.handle(Server.java:497)
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
> at
> org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
> at java.lang.Thread.run(Thread.java:745)
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