java - Solr 错误返回类型错误

Question

我正在尝试使用一个基本的 Solr 教程，但我遇到了一个我以前从未见过的错误，也无法在网上找到详细信息。

我的代码是:

import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrServer;
import org.apache.solr.common.SolrInputDocument;

import java.io.IOException;

public class SolrjPopulator {
  public static void main(String[] args) throws IOException, SolrServerException {
    HttpSolrServer server = new HttpSolrServer("http://localhost:8983/solr");
    for(int i=0;i<1000;++i) {
      SolrInputDocument doc = new SolrInputDocument();
      doc.addField("cat", "book");
      doc.addField("id", "book-" + i);
      doc.addField("name", "The Legend of the Hobbit part " + i);
      server.add(doc);
      if(i%100==0) server.commit();  // periodically flush
    }
    server.commit(); 
  }
}

我得到的控制台错误是:

Exception in thread "main" java.lang.VerifyError: Bad return type
Exception Details:
  Location:
    org/apache/solr/client/solrj/impl/HttpClientUtil.createClient(Lorg/apache/solr/common/params/SolrParams;Lorg/apache/http/conn/ClientConnectionManager;)Lorg/apache/http/impl/client/CloseableHttpClient; @62: areturn
  Reason:
    Type 'org/apache/http/impl/client/DefaultHttpClient' (current frame, stack[0]) is not assignable to 'org/apache/http/impl/client/CloseableHttpClient' (from method signature)
  Current Frame:
    bci: @62
    flags: { }
    locals: { 'org/apache/solr/common/params/SolrParams', 'org/apache/http/conn/ClientConnectionManager', 'org/apache/solr/common/params/ModifiableSolrParams', 'org/apache/http/impl/client/DefaultHttpClient' }
    stack: { 'org/apache/http/impl/client/DefaultHttpClient' }
  Bytecode:
    0x0000000: bb00 0359 2ab7 0004 4db2 0005 b900 0601
    0x0000010: 0099 001e b200 05bb 0007 59b7 0008 1209
    0x0000020: b600 0a2c b600 0bb6 000c b900 0d02 00bb
    0x0000030: 0011 592b b700 124e 2d2c b800 102d b0 
  Stackmap Table:
    append_frame(@47,Object[#127])

            at org.apache.solr.client.solrj.impl.HttpSolrClient.<init>(HttpSolrClient.java:186)
            at org.apache.solr.client.solrj.impl.HttpSolrClient.<init>(HttpSolrClient.java:159)
            at org.apache.solr.client.solrj.impl.HttpSolrServer.<init>(HttpSolrServer.java:30)
            at com.coba.efx.news.server.SolrPopulator.main(SolrPopulator.java:14)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.lang.reflect.Method.invoke(Method.java:483)
            at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

Process finished with exit code 1

此外，HttpSolrServer 类似乎已“弃用”。我不知道这到底是什么意思，但是有人可以告诉我问题是什么以及是否可以解决吗？谢谢。

Answer 1

HttpSolrClient 有一个 constructor接受一个 HttpClient。如果未通过，它会创建一个 internalClient，它是一个 CloseableHttpClient。

因此您可以创建一个默认客户端并按如下方式传递..

SystemDefaultHttpClient httpClient = new SystemDefaultHttpClient();
HttpSolrClient client = new HttpSolrClient(url, httpClient);