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class="theme-doc-version-badge badge badge--secondary">Version: 3.11</span><div class="tocCollapsible_aw-L theme-doc-toc-mobile tocMobile_Tx6Y"><button type="button" class="clean-btn tocCollapsibleButton_zr6a">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Debug mode</h1></header><p>You can use APISIX's debug mode to troubleshoot your configuration.</p><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithHideOnScrollNavbar_3ly5" id="basic-debug-mode"></a>Basic debug mode<a class="hash-link" href="#basic-debug-mode" title="Direct link to heading">#</a></h2><p>You can enable the basic debug mode by adding this line to your debug configuration file (<code>conf/debug.yaml</code>):</p><div class="codeBlockContainer_EiTO"><div style="color:#393A34;background-color:#f6f8fa" class="codeBlockTitle_PQMO">conf/debug.yaml</div><div class="codeBlockContent_X2I6 yaml"><pre tabindex="0" class="prism-code language-yaml codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token key atrule" style="color:#00a4db">basic</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">enable</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token boolean important" style="color:#36acaa">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">#END</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><p>APISIX loads the configurations of <code>debug.yaml</code> on startup and then checks if the file is modified on an interval of 1 second. If the file is changed, APISIX automatically applies the configuration changes.</p><div class="admonition admonition-note alert alert--secondary"><div class="admonition-heading"><h5><span class="admonition-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="16" viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>note</h5></div><div class="admonition-content"><p>For APISIX releases prior to v2.10, basic debug mode is enabled by setting <code>apisix.enable_debug = true</code> in your configuration file (<code>conf/config.yaml</code>).</p></div></div><p>If you have configured two Plugins <code>limit-conn</code> and <code>limit-count</code> on the Route <code>/hello</code>, you will receive a response with the header <code>Apisix-Plugins: limit-conn, limit-count</code> when you enable the basic debug mode.</p><div class="codeBlockContainer_EiTO"><div class="codeBlockContent_X2I6 shell"><pre tabindex="0" class="prism-code language-shell codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token function" style="color:#d73a49">curl</span><span class="token plain"> http://127.0.0.1:1984/hello -i</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><div class="codeBlockContainer_EiTO"><div class="codeBlockContent_X2I6 shell"><pre tabindex="0" class="prism-code language-shell codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token plain">HTTP/1.1 </span><span class="token number" style="color:#36acaa">200</span><span class="token plain"> OK</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">Content-Type: text/plain</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">Transfer-Encoding: chunked</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">Connection: keep-alive</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">Apisix-Plugins: limit-conn, limit-count</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">X-RateLimit-Limit: </span><span class="token number" style="color:#36acaa">2</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">X-RateLimit-Remaining: </span><span class="token number" style="color:#36acaa">1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">Server: openresty</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">hello world</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><div class="admonition admonition-info alert alert--info"><div class="admonition-heading"><h5><span class="admonition-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="16" viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>IMPORTANT</h5></div><div class="admonition-content"><p>If the debug information cannot be included in a response header (for example, when the Plugin is in a stream subsystem), the debug information will be logged as an error log at a <code>warn</code> level.</p></div></div><h2><a aria-hidden="true" tabindex="-1" class="anchor anchor__h2 anchorWithHideOnScrollNavbar_3ly5" id="advanced-debug-mode"></a>Advanced debug mode<a class="hash-link" href="#advanced-debug-mode" title="Direct link to heading">#</a></h2><p>You can configure advanced options in debug mode by modifying your debug configuration file (<code>conf/debug.yaml</code>).</p><p>The following configurations are available:</p><table><thead><tr><th>Key</th><th>Required</th><th>Default</th><th>Description</th></tr></thead><tbody><tr><td>hook_conf.enable</td><td>True</td><td>false</td><td>Enables/disables hook debug trace. i.e. if enabled, will print the target module function's inputs or returned value.</td></tr><tr><td>hook_conf.name</td><td>True</td><td></td><td>Module list name of the hook that enabled the debug trace.</td></tr><tr><td>hook_conf.log_level</td><td>True</td><td>warn</td><td>Log level for input arguments & returned values.</td></tr><tr><td>hook_conf.is_print_input_args</td><td>True</td><td>true</td><td>When set to <code>true</code> enables printing input arguments.</td></tr><tr><td>hook_conf.is_print_return_value</td><td>True</td><td>true</td><td>When set to <code>true</code> enables printing returned values.</td></tr></tbody></table><div class="admonition admonition-note alert alert--secondary"><div class="admonition-heading"><h5><span class="admonition-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="16" viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>note</h5></div><div class="admonition-content"><p>A checker would check every second for changes to the configuration file. It will only check a file if the file was updated based on its last modification time.</p><p>You can add an <code>#END</code> flag to indicate to the checker to only look for changes until that point.</p></div></div><p>The example below shows how you can configure advanced options in debug mode:</p><div class="codeBlockContainer_EiTO"><div style="color:#393A34;background-color:#f6f8fa" class="codeBlockTitle_PQMO">conf/debug.yaml</div><div class="codeBlockContent_X2I6 yaml"><pre tabindex="0" class="prism-code language-yaml codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token key atrule" style="color:#00a4db">hook_conf</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">enable</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token boolean important" style="color:#36acaa">false</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># Enables/disables hook debug trace</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">name</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> hook_phase </span><span class="token comment" style="color:#999988;font-style:italic"># Module list name of the hook that enabled the debug trace</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">log_level</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> warn </span><span class="token comment" style="color:#999988;font-style:italic"># Log level for input arguments & returned values</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">is_print_input_args</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token boolean important" style="color:#36acaa">true</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># When set to `true` enables printing input arguments</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">is_print_return_value</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token boolean important" style="color:#36acaa">true</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># When set to `true` enables printing returned values</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token key atrule" style="color:#00a4db">hook_phase</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># Module function list, Name: hook_phase</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">apisix</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># Referenced module name</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain"> http_access_phase </span><span class="token comment" style="color:#999988;font-style:italic"># Function names：Array</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain"> http_header_filter_phase</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain"> http_body_filter_phase</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain"> http_log_phase</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">#END</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><h3><a aria-hidden="true" tabindex="-1" class="anchor anchor__h3 anchorWithHideOnScrollNavbar_3ly5" id="dynamically-enable-advanced-debug-mode"></a>Dynamically enable advanced debug mode<a class="hash-link" href="#dynamically-enable-advanced-debug-mode" title="Direct link to heading">#</a></h3><p>You can also enable advanced debug mode only on particular requests.</p><p>The example below shows how you can enable it on requests with the header <code>X-APISIX-Dynamic-Debug</code>:</p><div class="codeBlockContainer_EiTO"><div style="color:#393A34;background-color:#f6f8fa" class="codeBlockTitle_PQMO">conf/debug.yaml</div><div class="codeBlockContent_X2I6 yaml"><pre tabindex="0" class="prism-code language-yaml codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token key atrule" style="color:#00a4db">http_filter</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">enable</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token boolean important" style="color:#36acaa">true</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic"># Enable/disable advanced debug mode dynamically</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token key atrule" style="color:#00a4db">enable_header_name</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> X</span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain">APISIX</span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain">Dynamic</span><span class="token punctuation" style="color:#393A34">-</span><span class="token plain">Debug </span><span class="token comment" style="color:#999988;font-style:italic"># Trace for the request with this header</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">...</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">#END</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><p>This will enable the advanced debug mode only for requests like:</p><div class="codeBlockContainer_EiTO"><div class="codeBlockContent_X2I6 shell"><pre tabindex="0" class="prism-code language-shell codeBlock_UxnK thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_W6UD"><span class="token-line" style="color:#393A34"><span class="token function" style="color:#d73a49">curl</span><span class="token plain"> </span><span class="token number" style="color:#36acaa">127.0</span><span class="token plain">.0.1:9090/hello --header </span><span class="token string" style="color:#e3116c">'X-APISIX-Dynamic-Debug: foo'</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_V-PD clean-btn">Copy</button></div></div><div class="admonition admonition-note alert alert--secondary"><div class="admonition-heading"><h5><span class="admonition-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="16" viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>note</h5></div><div class="admonition-content"><p>The <code>apisix.http_access_phase</code> module cannot be hooked for this dynamic rule as the advanced debug mode is enabled based on the request.</p></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="/edit#https://github.com/apache/apisix/edit/release/3.11/docs/en/latest/debug-mode.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_mS5F" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_mt2f"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/docs/apisix/3.11/plugin-develop/"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">« Plugin Develop</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/apisix/3.11/deployment-modes/"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Deployment modes »</div></a></div></nav></div></div><div class="col col--3"><div class="tableOfContents_vrFS thin-scrollbar"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#basic-debug-mode" class="table-of-contents__link">Basic debug mode</a></li><li><a href="#advanced-debug-mode" class="table-of-contents__link">Advanced debug mode</a><ul><li><a href="#dynamically-enable-advanced-debug-mode" class="table-of-contents__link">Dynamically enable advanced debug mode</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="container_MP5Z"><div 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