Hi, I think I've discovered a bug with the JSONResponseWriter : starting from the following query -
http://127.0.0.1:8080/solr-urbamet/select?q=(tout:1)&rows=0&sort=TITRE+desc&facet=true&facet.query=SUJET:b*&facet.field=SUJET&facet.prefix=b&facet.limit=1&facet.missing=true&wt=json&json.nl=arrarr - which produced a NullPointerException (see the stacktrace below), I played with the parameters and obtained the following results : ##PAGINATION rows : starting from 0, the exception occurs until we pass a certain threshold => rows implicated ##SORTING the rows threshold afore mentionned seems to be influenced by the presence/absence of the sort parameter ##FACETS facet=false => OK while facet=true => NullPointerException =>facets implicated -- facet.field absent => OK while facet.field=whatever => NullPointerException =>facet.field implicated -- facet.missing=false => OK while facet.missing=true => NullPointerException => facet.missing implicated -- facet.limit=-1 or 0 => OK while facet.limit>0 => NullPointerException => facet.limit implicated -- facet.query absent or facet.query = whatever => NullPointerException =>facet.query not implicated -- facet.offset=(several values or absent) => NullPointerException => facet.offset not implicated -- => facet.sort not implicated (true or false => NullPointerException) -- => facet.mincount not implicated (several values or absent => NullPointerException) #ResponseWriter wt=standard => ok while wt=json => NullPointerException => jsonwriter implicated json.nl=flat or map => ok => jsonwriter 'arrarr' format implicated I hope this debugging is readable and will help. -- Grégoire Neuville Stacktrace : GRAVE: java.lang.NullPointerException at org.apache.solr.request.JSONWriter.writeStr(JSONResponseWriter.java:607) at org.apache.solr.request.JSONWriter.writeNamedListAsArrArr(JSONResponseWriter.java:245) at org.apache.solr.request.JSONWriter.writeNamedList(JSONResponseWriter.java:294) at org.apache.solr.request.TextResponseWriter.writeVal(TextResponseWriter.java:151) at org.apache.solr.request.JSONWriter.writeNamedListAsMapWithDups(JSONResponseWriter.java:175) at org.apache.solr.request.JSONWriter.writeNamedList(JSONResponseWriter.java:288) at org.apache.solr.request.TextResponseWriter.writeVal(TextResponseWriter.java:151) at org.apache.solr.request.JSONWriter.writeNamedListAsMapWithDups(JSONResponseWriter.java:175) at org.apache.solr.request.JSONWriter.writeNamedList(JSONResponseWriter.java:288) at org.apache.solr.request.TextResponseWriter.writeVal(TextResponseWriter.java:151) at org.apache.solr.request.JSONWriter.writeNamedListAsMapWithDups(JSONResponseWriter.java:175) at org.apache.solr.request.JSONWriter.writeNamedList(JSONResponseWriter.java:288) at org.apache.solr.request.JSONWriter.writeResponse(JSONResponseWriter.java:88) at org.apache.solr.request.JSONResponseWriter.write(JSONResponseWriter.java:49) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:257) 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:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) 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:595)
