java - 使用 "org.apache.solr.common.util.SimpleOrderedMap cannot be cast to java.util.Map"处理程序时出现 solrj "/suggest"异常

Question

尝试使用/suggest 处理程序运行 solrj 程序时，出现类转换异常。我能够从 Solr 管理 UI 获得建议响应，但是当从 solrj 客户端尝试相同的操作时，会出现上述异常。

solr-config.xml 条目如下:

 <searchComponent name="suggest" class="solr.SuggestComponent">
    <lst name="suggester">
            <str name="name">mySuggester</str>
            <str name="lookupImpl">FuzzyLookupFactory</str>
            <str name="dictionaryImpl">DocumentDictionaryFactory</str>
            <str name="field">suggestfield</str>
            <str name="suggestAnalyzerFieldType">text_general</str>

    </lst>
  </searchComponent>

  <requestHandler name="/suggest" class="solr.SearchHandler" startup="lazy">
    <lst name="defaults">
            <str name="suggest">true</str>
            <str name="suggest.count">10</str>
        <str name="suggest.dictionary">mySuggester</str>
    </lst>
    <arr name="components">
            <str>suggest</str>
    </arr>
  </requestHandler>

schema.xml 包含字段

<field name="suggestfield" type="text_general" indexed="true" stored="true"/>

这是多个字段的 copyField。

java代码如下:

 String url = "http://localhost:8983/solr/testwidget"; 
    HttpSolrClient client = new HttpSolrClient.Builder(url).build();
    client.setParser(new XMLResponseParser());

    SolrQuery query = new SolrQuery();
    query.setRequestHandler("/suggest");
    query.setParam("suggest.build", true);
    query.setParam("suggest", true);
    query.setParam("suggest.dictionary", "mySuggester");
    query.setParam("suggest.q", "acc");

    QueryResponse response = client.query(query);
  System.out.println(response.getSuggesterResponse().getSuggestedTerms());

异常(exception)情况如下:

 Exception in thread "main" java.lang.ClassCastException: org.apache.solr.common.util.SimpleOrderedMap cannot be cast to java.util.Map
    at org.apache.solr.client.solrj.response.QueryResponse.setResponse(QueryResponse.java:161)
    at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:194)
    at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:942)
    at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:957)
    at com.intellectdesign.canvas.solr.SolrjTest.main(SolrjTest.java:41)

Answer 1

我不确定为什么它设置 XMLResponseParser 然后请求 wt=json。我认为https://github.com/apache/lucene-solr/blob/master/solr/solrj/src/test/org/apache/solr/client/solrj/response/TestSuggesterResponse.java可以用作开始的示例。