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class="article"> <nav class="toolbar" aria-label="Toolbar"> <button class="nav-toggle" type="button" aria-label="Toggle submenu"></button> <nav class="breadcrumbs" aria-label="breadcrumbs"> <ul> <li><a href="../index.html">User manual</a></li> <li><a href="index.html">FAQ</a></li> <li><a href="how-do-i-enable-streams-when-debug-logging-messages-in-camel.html">How do I enable streams when debug logging messages in Camel?</a></li> </ul> </nav> <div class="edit-this-page"><a href="https://github.com/apache/camel/edit/main/docs/user-manual/modules/faq/pages/how-do-i-enable-streams-when-debug-logging-messages-in-camel.adoc">Edit this Page</a></div> </nav> <div class="content"> <article class="doc"> <h1 class="page">How do I enable streams when debug logging messages in Camel</h1> <div id="preamble"> <div class="sectionbody"> <div class="paragraph"> <p><strong>Since Camel 2.1</strong></p> </div> <div class="paragraph"> <p>When you run Camel with <code>DEBUG</code> level as logging, it will log the messages and its content from time to time. As some messages can contain streams, which are prone to be not readable multiple times, and therefore Camel will by default <strong>not</strong> log these types.</p> </div> <div class="paragraph"> <p>These instances are not logged by default:</p> </div> <div class="ulist"> <ul> <li> <p><code>java.xml.transform.StreamSource</code></p> </li> <li> <p><code>java.io.InputStream</code></p> </li> <li> <p><code>java.io.OutputStream</code></p> </li> <li> <p><code>java.io.Reader</code></p> </li> <li> <p><code>java.io.Writer</code></p> </li> </ul> </div> <div class="paragraph"> <p>You will see this in the log as:</p> </div> <div class="listingblock"> <div class="content"> <pre>DEBUG ProducerCache - >>>> Endpoint[direct:start] Exchange[Message: [Body is instance of java.xml.transform.StreamSource]]</pre> </div> </div> <div class="paragraph"> <p>Here we have a message which is XML stream based. You can customize whether Camel should log the payload anyway.</p> </div> </div> </div> <div class="sect1"> <h2 id="HowdoIenablestreamswhendebugloggingmessagesinCamel-CustomizingfromJavaDSL"><a class="anchor" href="#HowdoIenablestreamswhendebugloggingmessagesinCamel-CustomizingfromJavaDSL"></a>Customizing from Java DSL</h2> <div class="sectionbody"> <div class="paragraph"> <p>You add to the Camel properties the flag to log streams.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java"> context.getGlobalOptions().put(Exchange.LOG_DEBUG_BODY_STREAMS, "true");</code></pre> </div> </div> <div class="paragraph"> <p>Notice default is <code>false</code>.</p> </div> </div> </div> <div class="sect1"> <h2 id="HowdoIenablestreamswhendebugloggingmessagesinCamel-CustomizingfromSpringDSL"><a class="anchor" href="#HowdoIenablestreamswhendebugloggingmessagesinCamel-CustomizingfromSpringDSL"></a>Customizing from Spring DSL</h2> <div class="sectionbody"> <div class="paragraph"> <p>You add to the Camel properties the flag to log streams.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java"> <camelContext> |
| <property key="CamelLogDebugBodyStreams" value="true"/> |
| </camelContext></code></pre> </div> </div> <div class="paragraph"> <p>Notice default is <code>false</code>.</p> </div> </div> </div> </article> <aside class="toc sidebar" aria-label="Table of contents" data-title="Contents" data-levels="2"> <div class="toc-menu"></div> </aside> </div> </main> </div> <div class="footer-tools"> <a href="#top" title="Reach the top of the page">Back to top</a> </div> <footer> <div class="footer"> <figure class="logo"> <img src="../../_/img/logo-d-a567cee6fa.svg" class="logo-small mt-60" alt="Apache Camel Logo" aria-label="white silhouette of a camel in front of a sand dune"> </figure> <input id="footer-toggle-overview" type="checkbox" title="Show/Hide Overview section"> <dl> <dt><label for="footer-toggle-overview">Overview</label><label for="footer-toggle-overview">＋</label></dt> <dd><a href="../../blog/">Blog</a></dd> <dd><a href="../../docs/">Documentation</a></dd> <dd><a href="../../community/support/">Community</a></dd> <dd><a href="../../download/">Download</a></dd> </dl> <input id="footer-toggle-documentation" type="checkbox" title="Show/Hide Documentation section"> <dl> <dt><label for="footer-toggle-documentation">Documentation</label><label for="footer-toggle-documentation">＋</label></dt> <dd><a href="../../manual/">User Manual</a></dd> <dd><a href="../../components/next/index.html">Components</a></dd> <dd><a href="../../camel-k/next/">Camel-K</a></dd> <dd><a href="../../camel-kafka-connector/next/">Camel Kafka Connector</a></dd> <dd><a href="../../camel-quarkus/next/">Camel Quarkus</a></dd> <dd><a href="../../camel-spring-boot/next/">Camel Spring Boot</a></dd> <dd><a href="../../camel-karaf/3.22.x/">Camel Karaf</a></dd> <dd><a href="../../manual/faq/index.html">FAQ</a></dd> </dl> <input id="footer-toggle-community" type="checkbox" title="Show/Hide Community section"> <dl> <dt><label for="footer-toggle-community">Community</label><label for="footer-toggle-community">＋</label></dt> <dd><a href="../../community/support/">Support</a></dd> <dd><a href="../../community/contributing/">Contributing</a></dd> <dd><a href="../../community/mailing-list/">Mailing Lists</a></dd> <dd><a href="../../community/user-stories/">User stories</a></dd> <dd><a href="../../community/articles/">Articles</a></dd> <dd><a href="../../community/books/">Books</a></dd> <dd><a href="../../community/team/">Team</a></dd> </dl> <input id="footer-toggle-about" type="checkbox" title="Show/Hide Acknowledgements section"> <dl> <dt><label for="footer-toggle-about">About</label><label for="footer-toggle-about">＋</label></dt> <dd><a href="../../acknowledgments/">Acknowledgments</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/events/current-event.html" title="Apache Events">Apache Events</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/licenses/" title="License">License</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/security/" title="Security">Security</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/foundation/sponsorship.html" title="Sponsorship">Sponsorship</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/foundation/thanks.html" title="Thanks">Thanks</a></dd> </dl> <p class="remark"> © 2004-2025 The <a href="https://apache.org">Apache Software Foundation</a>.<br> Apache Camel, Camel, Apache, the Apache feather logo, and the Apache Camel project logo are trademarks of The Apache Software Foundation. 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