solr terms返回零

我在跑步 7.2.1 版本,使用 SolrCloud 使用基于示例配置的集合。 lucene 部分配置( http://localhost:8983/solr/admin/info/system?wt=yaml )是的

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"

术语配置( http://localhost:8983/solr/trans/config?wt=yaml )是:

name    "terms"
class   "solr.TermsComponent"

这个 http://localhost:8983/solr/trans/terms?wt=xml 返回值:

<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>

尽管集合中有1K个文档( http://localhost:8983/solr/trans/query?q=*:*&rows=0 ,2MB文本):

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

我怎样才能看到这些术语(及其频率)?