I have been trying the MLT Query using EmbeddedSolr and SolrJ clients, which is resulting in NPE.
It looks like a problem as mentioned here https://issues.apache.org/jira/browse/LUCENE-819 If that is the case,how to fix this? The MLT field has been stored with termvectors. The query i used and the exception is below. In debug mode Lucene term.hascode() has been receiving some fields in the index and breaking with the id field, I was hoping to see the exception happening bcos of the mlt fields/fieldValues. But it didn't. Can somebody help me please, i have already spent a whole saturday night with the trunk code ;-( SolrQuery q = new SolrQuery(); q.setQuery( "id:100001"); q.addFacetField("l"); q.setFacet(true); q.setFacetMinCount(1); q.setParam("mlt", true); q.setParam("mlt.fl","field1"); q.setParam("mlt.minwl","1"); q.setParam("mlt.mintf","1"); q.setParam("mlt.mindf","1"); QueryResponse response = server.query( q ); SEVERE: java.lang.NullPointerException at org.apache.lucene.index.Term.hashCode(Term.java:78) at org.apache.lucene.search.TermQuery.hashCode (TermQuery.java:175) at org.apache.lucene.search.BooleanClause.hashCode(BooleanClause.java :108) at java.util.AbstractList.hashCode(AbstractList.java:630) at org.apache.lucene.search.BooleanQuery.hashCode (BooleanQuery.java :445) at org.apache.solr.search.QueryResultKey.<init>(QueryResultKey.java:47) at org.apache.solr.search.SolrIndexSearcher.getDocListC( SolrIndexSearcher.java:725) at org.apache.solr.search.SolrIndexSearcher.getDocListAndSet ( SolrIndexSearcher.java:1241) at org.apache.solr.handler.MoreLikeThisHandler$MoreLikeThisHelper.getMoreLikeThis (MoreLikeThisHandler.java:280) at org.apache.solr.handler.MoreLikeThisHandler$MoreLikeThisHelper.getMoreLikeThese( MoreLikeThisHandler.java:310) at org.apache.solr.handler.StandardRequestHandler.handleRequestBody( StandardRequestHandler.java:142) at org.apache.solr.handler.RequestHandlerBase.handleRequest( RequestHandlerBase.java :78) at org.apache.solr.core.SolrCore.execute(SolrCore.java:894) at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request( EmbeddedSolrServer.java:106) at org.apache.solr.client.solrj.request.QueryRequest.process ( QueryRequest.java:80) at org.apache.solr.client.solrj.impl.BaseSolrServer.query( BaseSolrServer.java:99) at my.padam.solr.SolrJQueryTest.testQuery(SolrJQueryTest.java:134) at my.padam.solr.SolrJQueryTest.main (SolrJQueryTest.java:165) -- Thanks George L
