Hello,
I am using SolrCloud on Solr 7.2.1.
I get the NullPointerException in the Solr logs (in ExportWriter.java) when
the /stream handler is invoked with a search() streaming expression with
qt="/export" containing fq="{!collapse field=id_field sort="time desc"}
(among other fq's. I tried eliminating one fq at a time to find the
problematic one. The one with collapse parser is what makes it fail).
I see an open JIRA for this issue (with a submitted patch which has not yet
been accepted):
https://issues.apache.org/jira/browse/SOLR-8291
In my case useFilterForSortedQuery=false
org.apache.solr.servlet.HttpSolrCall null:java.lang.NullPointerException
at org.apache.lucene.util.BitSetIterator.<init>(BitSetIterator.java:61)
at org.apache.solr.handler.ExportWriter.writeDocs(ExportWriter.java:243)
at org.apache.solr.handler.ExportWriter.lambda$null$1(ExportWriter.java:222)
at
org.apache.solr.response.JSONWriter.writeIterator(JSONResponseWriter.java:523)
at
org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:180)
at org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter.java:559)
at org.apache.solr.handler.ExportWriter.lambda$null$2(ExportWriter.java:222)
at org.apache.solr.response.JSONWriter.writeMap(JSONResponseWriter.java:547)
at
org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:198)
at org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter.java:559)
at
org.apache.solr.handler.ExportWriter.lambda$write$3(ExportWriter.java:220)
at org.apache.solr.response.JSONWriter.writeMap(JSONResponseWriter.java:547)
at org.apache.solr.handler.ExportWriter.write(ExportWriter.java:218)
at org.apache.solr.core.SolrCore$3.write(SolrCore.java:2627)
at
org.apache.solr.response.QueryResponseWriterUtil.writeQueryResponse(QueryResponseWriterUtil.java:49)
at org.apache.solr.servlet.HttpSolrCall.writeResponse(HttpSolrCall.java:788)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:525)
Above is a smaller trace; I can provide the complete stacktrace if it
helps. Before considering making a fix in ExportWriter.java and rebuilding
Solr as a last resort, I want to make sure I am not using something which
is not supported on SolrCloud. Can anybody please help?
