向Solr发送HTML文档遇Zip bomb异常，能否调整Tika的XML嵌套深度限制？

Absolutely! You can adjust Tika's XML element nesting depth limit within Solr to resolve this "Zip bomb detected!" error caused by the default 100-level nesting restriction. Here are the step-by-step configurations for common Solr-Tika integration scenarios:

1. 配置ExtractRequestHandler（直接提取或基础导入） #

If you're using Solr's ExtractingRequestHandler (e.g., for direct document uploads via /update/extract), follow these steps:

Step 1: 创建自定义Tika配置文件 #

Create a tika-config.xml file (place it in your Solr core's conf directory for easy access) with the following content, adjusting the maxDepth value to match your required nesting level:

<?xml version="1.0" encoding="UTF-8"?>
<properties>
  <parsers>
    <!-- 配置XMLParser的嵌套深度 -->
    <parser class="org.apache.tika.parser.xml.XMLParser">
      <params>
        <param name="maxDepth" type="int">500</param> <!-- 修改为你需要的嵌套层数 -->
      </params>
    </parser>
    <!-- HTMLParser继承自XMLParser，也可以单独配置 -->
    <parser class="org.apache.tika.parser.html.HtmlParser">
      <params>
        <param name="maxDepth" type="int">500</param>
      </params>
    </parser>
  </parsers>
</properties>

Step 2: 在solrconfig.xml中关联配置文件 #

Update your core's solrconfig.xml to let the ExtractingRequestHandler use your custom Tika config:

<requestHandler name="/update/extract" class="org.apache.solr.handler.extraction.ExtractingRequestHandler">
  <lst name="defaults">
    <str name="fmap.content">text</str>
    <str name="uprefix">ignored_</str>
  </lst>
  <!-- 添加初始化参数指向自定义配置 -->
  <init-param>
    <name>tika.config</name>
    <value>./conf/tika-config.xml</value> <!-- 路径对应配置文件的位置 -->
  </init-param>
</requestHandler>

2. 配置Data Import Handler（DIH）中的TikaEntityProcessor #

If you're using Tika via Solr's Data Import Handler (DIH) with TikaEntityProcessor, specify the custom Tika config directly in your data-config.xml:

<dataConfig>
  <dataSource type="BinFileDataSource" />
  <document>
    <entity name="html_doc" 
            processor="TikaEntityProcessor"
            url="/path/to/your/html/documents"
            format="html"
            tikaConfig="./conf/tika-config.xml"> <!-- 关联自定义Tika配置 -->
      <field column="content" name="text" />
      <!-- 其他字段映射 -->
    </entity>
  </document>
</dataConfig>

注意事项 #

• 权衡风险: Increasing maxDepth beyond the default 100 can expose you to potential memory issues or denial-of-service (DoS) attacks if processing maliciously nested documents. Set a value that matches your actual valid document's nesting structure, not arbitrarily high.
• 路径验证: Ensure the tika-config.xml path is accessible to Solr—using a relative path from the core's root (like ./conf/tika-config.xml) is the most reliable approach for core-specific configurations.
• 重启生效: After making these changes, restart your Solr instance to apply the new configuration.

内容的提问来源于stack exchange，提问作者Harinder