"java.lang.NullPointerException\n\tat org.apache.solr.search.facet.SumSlotAcc.collect(SlotAcc.java:353)\n\tat org.apache.solr.search.facet.FacetFieldProcessor$MultiAcc.collect(FacetFieldProcessor.java:481)\n\tat org.apache.solr.search.facet.FacetFieldProcessor.collectFirstPhase(FacetFieldProcessor.java:230)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV.collectValFirstPhase(FacetFieldProcessorByHashDV.java:438)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV.access$100(FacetFieldProcessorByHashDV.java:50)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV$6.collect(FacetFieldProcessorByHashDV.java:424)\n\tat org.apache.solr.search.DocSetUtil.collectSortedDocSet(DocSetUtil.java:284)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV.collectDocs(FacetFieldProcessorByHashDV.java:407)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV.calcFacets(FacetFieldProcessorByHashDV.java:247)\n\tat org.apache.solr.search.facet.FacetFieldProcessorByHashDV.process(FacetFieldProcessorByHashDV.java:214)\n\tat org.apache.solr.search.facet.FacetProcessor.processSubs(FacetProcessor.java:460)\n\tat org.apache.solr.search.facet.FacetProcessor.fillBucket(FacetProcessor.java:407)\n\tat org.apache.solr.search.facet.FacetQueryProcessor.process(FacetQuery.java:64)\n\tat org.apache.solr.search.facet.FacetModule.process(FacetModule.java:154)\n\tat org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:295)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:177)\n\tat org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)\n\tat org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:710)\n\tat org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:516)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:382)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:326)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1751)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)\n\tat org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:534)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)\n\tat org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)\n\tat org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)\n\tat org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)\n\tat org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)\n\tat org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)\n\tat org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)\n\tat java.lang.Thread.run(Thread.java:745)\n"