Hello Lucene/Solr Experts, I am getting NullPointerException while using OR along with the join results.
Following are the documents and fields configured in my solr server(version 4.7.2). *brands {id, brand_name}* *products {id, product_name, brand_id}* Following are the data indexed *BRANDS: {1, Apple}, {2, Samsung}, {3, HTC}* *PRODUCTS: {10, iPhone, 1}, {11, iPad, 1}, {12, Galaxy S3, 2}, {13, Galaxy Note, 2}, {14, Desire, 3}* I am trying to get all the products with brand_name is "Samsung" or product_name is "Desire" Query which i am trying is *brand_name:Samsung OR {!join from=brand_id to=id} product_name:Desire* But i am getting error saying ERROR [SolrDispatchFilter] null:java.lang.NullPointerException: while trying to invoke the method org.apache.lucene.search.Query.hashCode() of a null object loaded from field org.apache.solr.search.JoinQuery.q of an object loaded from local variable 'this' at org.apache.solr.search.JoinQuery.hashCode(JoinQParserPlugin.java:594) at org.apache.lucene.search.BooleanClause.hashCode(BooleanClause.java:99) at java.util.AbstractList.hashCode(AbstractList.java:541) at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:520) at org.apache.solr.search.QueryResultKey.<init>(QueryResultKey.java:47) at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1305) at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:476) at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:461) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:217) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1916) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:768) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:415) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:205) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:812) What is right to use OR along with join query results? I also wanted to group multiple join results using OR. Something like following query *( field1:value1 OR field2:value2 OR field3:value3 OR {!join from=some_id to=some_other_id} field4:value4 OR {!join from=some_field_is to=some_other_field_id} field5:value5)* *AND field7:value7 AND datefield1:{* TO 2015-11-30T14:28:11Z } AND datefield2:{2015-11-30T14:28:11Z TO *}* Please suggest if any other way is there to do this. Thanks in advance. Regards, Suren.