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<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></nav> <ul class="sidebar-links"><li><a href="/troubleshooting.html" class="active sidebar-link">Troubleshooting</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/troubleshooting.html#asgi-lifespan-protocol-appears-unsupported" class="sidebar-link">ASGI 'lifespan' protocol appears unsupported</a></li></ul></li></ul> </aside> <main class="page"> <div class="content deprecation-warning" style="margin:1rem;margin-top:4.6rem;" data-v-b1b05e82><p data-v-b1b05e82><strong data-v-b1b05e82>Warning:</strong> Bocadillo is now <strong data-v-b1b05e82>UNMAINTAINED</strong>.
Users are recommended to migrate to a supported alternative, such as
<a href="https://www.starlette.io" target="_blank" rel="noreferrer" data-v-b1b05e82>Starlette</a>
or
<a href="https://fastapi.tiangolo.com" target="_blank" rel="noreferrer" data-v-b1b05e82>FastAPI</a>. Please see
<a href="https://github.com/bocadilloproject/bocadillo/issues/334" target="_blank" rel="noreferrer" data-v-b1b05e82>#344</a>
for more information.
</p></div> <div class="theme-default-content content__default"><h1 id="troubleshooting"><a href="#troubleshooting" aria-hidden="true" class="header-anchor">#</a> Troubleshooting</h1> <p>Solutions to common or potentially confusing problems are documented here.</p> <h2 id="asgi-lifespan-protocol-appears-unsupported"><a href="#asgi-lifespan-protocol-appears-unsupported" aria-hidden="true" class="header-anchor">#</a> ASGI 'lifespan' protocol appears unsupported</h2> <p>Uvicorn 7.0+ outputs this if an exception occurred during application startup. You can make Uvicorn log the exception by passing <code>--lifespan=on</code>, e.g.:</p> <div class="language-bash extra-class"><pre class="language-bash"><code>uvicorn myproject.asgi:app --lifespan<span class="token operator">=</span>on
</code></pre></div><p>In particular, this may occur if you use Bocadillo 0.14+ and did not call <code>configure()</code> before serving the application (see <a href="/guide/config.html">Configuration</a>).</p></div> <footer class="page-edit"><div class="edit-link"><a href="https://github.com/bocadilloproject/bocadillo/edit/release/docs/docs/troubleshooting.md" target="_blank" rel="noopener noreferrer">Edit this page on GitHub</a> <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></div> <div class="last-updated"><span class="prefix">Last Updated: </span> <span class="time">5/22/2019, 7:47:24 PM</span></div></footer> <!----> </main></div><div class="global-ui"></div></div>
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