<div id="docs-body">
 <div class="appendix">
  <div class="titlepage">
   <div>
    <div>
     <h1 class="title">
      <a name="error-handling">
      </a>
      Appendix B Error Messages and Common Problems
     </h1>
    </div>
   </div>
  </div>
  <div class="toc">
   <p>
    <b>
     Table of Contents
    </b>
   </p>
   <dl class="toc">
    <dt>
     <span class="section">
      <a href="error-message-elements.html">
       B.1 Error Message Sources and Elements
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="error-interfaces.html">
       B.2 Error Information Interfaces
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="problems.html">
       B.3 Problems and Common Errors
      </a>
     </span>
    </dt>
    <dd>
     <dl>
      <dt>
       <span class="section">
        <a href="what-is-crashing.html">
         B.3.1 How to Determine What Is Causing a Problem
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="common-errors.html">
         B.3.2 Common Errors When Using MySQL Programs
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="administration-issues.html">
         B.3.3 Administration-Related Issues
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="query-issues.html">
         B.3.4 Query-Related Issues
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="optimizer-issues.html">
         B.3.5 Optimizer-Related Issues
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="table-definition-issues.html">
         B.3.6 Table Definition-Related Issues
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="known-issues.html">
         B.3.7 Known Issues in MySQL
        </a>
       </span>
      </dt>
     </dl>
    </dd>
   </dl>
  </div>
  <p>
   This appendix describes the types of error information MySQL
    provides and how to obtain information about them. The final section
    is for troubleshooting. It describes common problems and errors that
    may occur and potential resolutions.
  </p>
  <h2>
   <a name="idm46045054787296">
   </a>
   Additional Resources
  </h2>
  <p>
   Other error-related documentation includes:
  </p>
  <div class="itemizedlist">
   <ul class="itemizedlist" style="list-style-type: disc; ">
    <li class="listitem">
     <p>
      Information about configuring where and how the server writes
        the error log:
      <a class="xref" href="error-log.html" title="7.4.2 The Error Log">
       Section 7.4.2, “The Error Log”
      </a>
     </p>
    </li>
    <li class="listitem">
     <p>
      Information about the character set used for error messages:
      <a class="xref" href="charset-errors.html" title="12.6 Error Message Character Set">
       Section 12.6, “Error Message Character Set”
      </a>
     </p>
    </li>
    <li class="listitem">
     <p>
      Information about the language used for error messages:
      <a class="xref" href="error-message-language.html" title="12.12 Setting the Error Message Language">
       Section 12.12, “Setting the Error Message Language”
      </a>
     </p>
    </li>
    <li class="listitem">
     <p>
      Information about errors related to
      <a class="link" href="innodb-storage-engine.html" title="Chapter 17 The InnoDB Storage Engine">
       <code class="literal">
        InnoDB
       </code>
      </a>
      :
      <a class="xref" href="innodb-error-handling.html" title="17.20.5 InnoDB Error Handling">
       Section 17.20.5, “InnoDB Error Handling”
      </a>
     </p>
    </li>
    <li class="listitem">
     <p>
      Information about errors specific to NDB Cluster:
      <a class="ulink" href="/doc/ndb-internals/en/ndb-errors.html" target="_top">
       NDB Cluster API Errors
      </a>
      ; see also
      <a class="ulink" href="/doc/ndbapi/en/ndb-api-errors.html" target="_top">
       NDB API Errors and Error Handling
      </a>
      , and
      <a class="ulink" href="/doc/ndbapi/en/mgm-errors.html" target="_top">
       MGM API Errors
      </a>
     </p>
    </li>
    <li class="listitem">
     <p>
      Descriptions of the error messages that the MySQL server and
        client programs generate:
      <a class="ulink" href="/doc/mysql-errors/8.4/en/" target="_top">
       MySQL 8.4 Error Message Reference
      </a>
     </p>
    </li>
   </ul>
  </div>
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