https://methakur.info/tags/dependencies/Recent content in Dependencies on Munish Thakur | DevOps EngineerHugoen-usTue, 05 Nov 2024 00:00:00 +0000https://methakur.info/blog/xmlsec-lxml-docker-fix/Tue, 05 Nov 2024 00:00:00 +0000https://methakur.info/blog/xmlsec-lxml-docker-fix/<p>Sometimes the most frustrating bugs are the ones with cryptic error messages. This was one of them.</p> <div class="highlight"><div style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-python" data-lang="python"><span style="display:flex;"><span><span style="color:#ff79c6">&gt;&gt;&gt;</span> <span style="color:#ff79c6">from</span> onelogin.saml2.auth <span style="color:#ff79c6">import</span> OneLogin_Saml2_Auth </span></span><span style="display:flex;"><span>xmlsec<span style="color:#ff79c6">.</span>Error: (<span style="color:#bd93f9">100</span>, <span style="color:#f1fa8c">&#39;lxml &amp; xmlsec libxml2 library version mismatch&#39;</span>) </span></span></code></pre></td></tr></table> </div> </div><p>The application container was crashing on startup, and all I had was this error message.</p> <h2 id="the-problem">The Problem</h2> <p>Our Django application needed SAML authentication, which required <code>python3-saml</code>. This package depends on both <code>lxml</code> and <code>xmlsec</code>, which both depend on the system library <code>libxml2</code>.</p>