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<title>3.&nbsp;Features</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="multi_spring-cloud-sleuth.html" title="Spring Cloud Sleuth"><link rel="up" href="multi_spring-cloud-sleuth.html" title="Spring Cloud Sleuth"><link rel="prev" href="multi__additional_resources.html" title="2.&nbsp;Additional Resources"><link rel="next" href="multi__sampling.html" title="4.&nbsp;Sampling"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">3.&nbsp;Features</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__additional_resources.html">Prev</a>&nbsp;</td><th width="60%" align="center">&nbsp;</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__sampling.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="_features" href="#_features"></a>3.&nbsp;Features</h1></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="simpara">Adds trace and span IDs to the Slf4J MDC, so you can extract all the logs from a given trace or span in a log aggregator, as shown in the following example logs:</p><pre class="screen">2016-02-02 15:30:57.902 INFO [bar,6bfd228dc00d216b,6bfd228dc00d216b,false] 23030 --- [nio-8081-exec-3] ...
<title>3.&nbsp;Features</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="multi_spring-cloud-sleuth.html" title="Spring Cloud Sleuth"><link rel="up" href="multi_spring-cloud-sleuth.html" title="Spring Cloud Sleuth"><link rel="prev" href="multi__additional_resources.html" title="2.&nbsp;Additional Resources"><link rel="next" href="multi__sampling.html" title="4.&nbsp;Sampling"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">3.&nbsp;Features</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__additional_resources.html">Prev</a>&nbsp;</td><th width="60%" align="center">&nbsp;</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__sampling.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="_features" href="#_features"></a>3.&nbsp;Features</h1></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="simpara">Adds trace and span IDs to the Slf4J MDC, so you can extract all the logs from a given trace or span in a log aggregator, as shown in the following example logs:</p><pre class="screen">2016-02-02 15:30:57.902 INFO [bar,6bfd228dc00d216b,6bfd228dc00d216b,false] 23030 --- [nio-8081-exec-3] ...
2016-02-02 15:30:58.372 ERROR [bar,6bfd228dc00d216b,6bfd228dc00d216b,false] 23030 --- [nio-8081-exec-3] ...
2016-02-02 15:31:01.936 INFO [bar,46ab0d418373cbc9,46ab0d418373cbc9,false] 23030 --- [nio-8081-exec-4] ...</pre><p class="simpara">Notice the <code class="literal">[appname,traceId,spanId,exportable]</code> entries from the MDC:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"><span class="strong"><strong><code class="literal">spanId</code></strong></span>: The ID of a specific operation that took place.</li><li class="listitem"><span class="strong"><strong><code class="literal">appname</code></strong></span>: The name of the application that logged the span.</li><li class="listitem"><span class="strong"><strong><code class="literal">traceId</code></strong></span>: The ID of the latency graph that contains the span.</li><li class="listitem"><span class="strong"><strong><code class="literal">exportable</code></strong></span>: Whether the log should be exported to Zipkin.
When would you like the span not to be exportable?