[jira] [Created] (SOLR-12542) Trying to export on a non doc-values field gives no response

["Varun Thacker (JIRA)" <ji...@apache.org>]

Varun Thacker created SOLR-12542:
------------------------------------

             Summary: Trying to export on a non doc-values field gives no response
                 Key: SOLR-12542
                 URL: https://issues.apache.org/jira/browse/SOLR-12542
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Varun Thacker
         Attachments: chrome.png

I wanted to see the current behaviour of the export writer when it came to boolean fields and ran into this issue.

Start solr: ./bin/solr start -e cloud -noprompt
{code:java}
~/solr-7.4.0$ curl -v "http://localhost:8983/solr/gettingstarted/export/?q=*:*&sort=a_b%20desc&fl=id"
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8983 (#0)
> GET /solr/gettingstarted/export/?q=*:*&sort=a_b%20desc&fl=id HTTP/1.1
> Host: localhost:8983
> User-Agent: curl/7.54.0
> Accept: */*
> 
< HTTP/1.1 500 Server Error
< Content-Type: application/octet-stream
< Content-Length: 0
< 
* Connection #0 to host localhost left intact{code}
 

This basically comes back with no response, and unless you look at the server logs can't tell what the error is. Chrome displays the attached screenshot which is what confused me to start with. 

From the logs
{code:java}
ERROR - 2018-07-09 12:04:53.951; [c:gettingstarted s:shard2 r:core_node8 x:gettingstarted_shard2_replica_n6] org.apache.solr.servlet.HttpSolrCall; null:java.io.IOException: a_b must have DocValues to use this feature.
at org.apache.solr.handler.ExportWriter.getSortDoc(ExportWriter.java:389)
at org.apache.solr.handler.ExportWriter.writeDocs(ExportWriter.java:231)
at org.apache.solr.handler.ExportWriter.lambda$null$1(ExportWriter.java:222)
at org.apache.solr.response.JSONWriter.writeIterator(JSONResponseWriter.java:515)
at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:179)
at org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter.java:551)
at org.apache.solr.handler.ExportWriter.lambda$null$2(ExportWriter.java:222){code}



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