solr terms returns nil

Question

I am running solr 7.2.1 version, using SolrCloud with a collection based on the example configuration. lucene part of the configuration (http://localhost:8983/solr/admin/info/system?wt=yaml) is

solr-spec-version   "7.2.1"
solr-impl-version   "7.2.1 b2b6438b37073bee1fca40374e85bf91aa457c0b - ubuntu - 2018-01-10 00:54:21"
lucene-spec-version "7.2.1"
lucene-impl-version "7.2.1 b2b6438b37073bee1fca40374e85bf91aa457c0b - ubuntu - 2018-01-10 00:48:43"

The terms configuration (http://localhost:8983/solr/trans/config?wt=yaml)is:

name    "terms"
class   "solr.TermsComponent"

The http://localhost:8983/solr/trans/terms?wt=xml returns:

<lst name="/terms">
  <str name="startup">lazy</str>
  <str name="name">/terms</str>
  <str name="class">solr.SearchHandler</str>
  <lst name="defaults">
    <bool name="terms">true</bool>
    <bool name="distrib">false</bool>
  </lst><arr name="components"><str>terms</str></arr>
</lst>

Although there are 1K documents in the collection (http://localhost:8983/solr/trans/query?q=*:*&rows=0, 2MB of text):

{
  "responseHeader":{
    "zkConnected":true,
    "status":0,
    "QTime":4,
    "params":{
      "q":"*:*",
      "rows":"0"}},
  "response":{"numFound":978,"start":0,"maxScore":1.0,"docs":[]
  }}

How can I see get the terms (and their frequencies)?

Answer 1

If you're going to use the terms component to get all terms for a field, you have to include the field you want the terms for:

http://localhost:8983/solr/trans/terms?terms.fl=fieldname&wt=xml