修改MyIndex.php后运行Solr任务出现401未授权错误如何修复？

问题背景 #

测试服务器此前基于silverstripe-solr-search模块实现的Solr搜索功能运行正常。尝试添加文件搜索功能时，新增了Search/MyIndex.php文件，并在mysite.yml中添加如下配置：

Firesphere\SolrSearch\Indexes\BaseIndex:
  class: MyIndex

之后运行以下任一命令，或直接使用搜索功能，都会触发401未授权错误：

vendor/bin/sake dev/tasks/SolrConfigureTask flush=all

vendor/bin/sake dev/tasks/SolrIndexTask

错误信息如下：

GuzzleHttp\Exception\ClientException: Client error: `GET http://localhost:8983/solr/admin/info/logging?since=0&wt=json` resulted in a `401 Unauthorized` response:

即使撤销上述添加文件搜索的修改，错误依然存在。

已完成的排查操作 #

• 确认Solr服务处于运行状态：
  执行命令service solr status，输出如下：

  ● solr.service - LSB: Controls Apache Solr as a Service
       Loaded: loaded (/etc/init.d/solr; generated)
       Active: active (exited) since Fri 2023-07-21 14:46:03 UTC; 16min ago
         Docs: man:systemd-sysv-generator(8)
      Process: 1493118 ExecStart=/etc/init.d/solr start (code=exited, status=0/SUCCESS)
  
  Jul 21 14:45:50 site-stage systemd[1]: Starting LSB: Controls Apache Solr as a Service...
  Jul 21 14:45:50 site-stage su[1493125]: (to solr) root on none
  Jul 21 14:45:50 site-stage su[1493125]: pam_unix(su-l:session): session opened for user solr by (uid=0)
  Jul 21 14:46:03 site-stage systemd[1]: Started LSB: Controls Apache Solr as a Service.
  

• 已在search.yml中配置模块参数：

  ---
  Name: MySolrSearch
  After: SolrSearch
  
  ---
  Firesphere\SolrSearch\Services\SolrCoreService:
    config:
      endpoint:
        localhost:
          host: localhost
          port: 8983
          timeout: 10
          # set up timeouts
          index_timeout: 10
          optimize_timeout: 100
          finalize_timeout: 300
          http_method: 'AUTO'
          # commit within 60ms
          commit_within: 60
    store:
      mode: 'file'
      path: '/var/solr/data'
    cpucores: 2
  

• 已在.env文件中设置SOLR_PASSWORD和SS_SOLR_INDEX环境变量。

• 尝试过重新设置权限（修正了原命令中的sermod拼写错误为usermod）：

  usermod -a -G www-data solr
  groups solr
  usermod -a -G solr www-data
  groups www-data
  chown -R solr:www-data /var/solr
  chmod -R u+rwxs,g+rwxs /var/solr
  

求助 #

如何修复该401未授权错误，恢复Solr搜索功能？

内容的提问来源于stack exchange，提问作者Will