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<title>Common application properties</title>
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<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#common-application-properties">Appendix A: Common application properties</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="common-application-properties"><a class="link" href="#common-application-properties">Appendix A: Common application properties</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Various properties can be specified inside your <code>application.properties</code> file, inside your <code>application.yml</code> file, or as command line switches.
This appendix provides a list of common Spring Cloud Sleuth properties and references to the underlying classes that consume them.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Property contributions can come from additional jar files on your classpath, so you should not consider this an exhaustive list.
Also, you can define your own properties.
</td>
</tr>
</table>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 33.3334%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Name</th>
<th class="tableblock halign-left valign-top">Default</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.annotation.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.async.configurer.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable default AsyncConfigurer.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.async.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable instrumenting async related components so that the tracing information is passed between threads.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.async.ignored-beans</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">List of {@link java.util.concurrent.Executor} bean names that should be ignored and not wrapped in a trace representation.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.baggage-keys</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">List of baggage key names that should be propagated out of process. These keys will be prefixed with <code>baggage</code> before the actual key. This property is set in order to be backward compatible with previous Sleuth versions. @see brave.propagation.ExtraFieldPropagation.FactoryBuilder#addPrefixedFields(String, java.util.Collection)</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.circuitbreaker.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable Spring Cloud CircuitBreaker instrumentation.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.feign.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable span information propagation when using Feign.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.feign.processor.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable post processor that wraps Feign Context in its tracing representations.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.grpc.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable span information propagation when using GRPC.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.http.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.http.legacy.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enables the legacy Sleuth setup.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.hystrix.strategy.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable custom HystrixConcurrencyStrategy that wraps all Callable instances into their Sleuth representative - the TraceCallable.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.hystrix.strategy.passthrough</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">When enabled the tracing information is passed to the Hystrix execution threads but spans are not created for each execution.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.integration.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable Spring Integration sleuth instrumentation.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.integration.patterns</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">[!hystrixStreamOutput*, *]</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">An array of patterns against which channel names will be matched. @see org.springframework.integration.config.GlobalChannelInterceptor#patterns() Defaults to any channel name not matching the Hystrix Stream channel name.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.integration.websockets.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable tracing for WebSockets.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.keys.http.headers</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Additional headers that should be added as tags if they exist. If the header value is multi-valued, the tag value will be a comma-separated, single-quoted list.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.keys.http.prefix</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">http.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Prefix for header names if they are added as tags.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.local-keys</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Same as {@link #propagationKeys} except that this field is not propagated to remote services. @see brave.propagation.ExtraFieldPropagation.FactoryBuilder#addRedactedField(String)</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.log.slf4j.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable a {@link Slf4jScopeDecorator} that prints tracing information in the logs.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.log.slf4j.whitelisted-mdc-keys</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">A list of keys to be put from baggage to MDC.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Should messaging be turned on.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.jms.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable tracing of JMS.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.jms.remote-service-name</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">jms</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.kafka.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable tracing of Kafka.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.kafka.mapper.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable DefaultKafkaHeaderMapper tracing for Kafka.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.kafka.remote-service-name</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">kafka</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.rabbit.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable tracing of RabbitMQ.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.messaging.rabbit.remote-service-name</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">rabbitmq</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.opentracing.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.propagation-keys</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">List of fields that are referenced the same in-process as it is on the wire. For example, the name "x-vcap-request-id" would be set as-is including the prefix. &lt;p&gt; Note: {@code fieldName} will be implicitly lower-cased. @see brave.propagation.ExtraFieldPropagation.FactoryBuilder#addField(String)</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.propagation.tag.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enables a {@link TagPropagationSpanHandler} that adds extra propagated fields to span tags.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.propagation.tag.whitelisted-keys</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">A list of keys to be put from extra propagation fields to span tags.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.reactor.decorate-on-each</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">When true decorates on each operator, will be less performing, but logging will always contain the tracing entries in each operator. When false decorates on last operator, will be more performing, but logging might not always contain the tracing entries.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.reactor.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">When true enables instrumentation for reactor.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.redis.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable span information propagation when using Redis.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.redis.remote-service-name</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">redis</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Service name for the remote Redis endpoint.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.rxjava.schedulers.hook.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable support for RxJava via RxJavaSchedulersHook.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.rxjava.schedulers.ignoredthreads</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">[HystrixMetricPoller, ^RxComputation.*$]</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thread names for which spans will not be sampled.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.sampler.probability</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Probability of requests that should be sampled. E.g. 1.0 - 100% requests should be sampled. The precision is whole-numbers only (i.e. there&#8217;s no support for 0.1% of the traces).</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.sampler.rate</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">10</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">A rate per second can be a nice choice for low-traffic endpoints as it allows you surge protection. For example, you may never expect the endpoint to get more than 50 requests per second. If there was a sudden surge of traffic, to 5000 requests per second, you would still end up with 50 traces per second. Conversely, if you had a percentage, like 10%, the same surge would end up with 500 traces per second, possibly overloading your storage. Amazon X-Ray includes a rate-limited sampler (named Reservoir) for this purpose. Brave has taken the same approach via the {@link brave.sampler.RateLimitingSampler}.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.scheduled.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable tracing for {@link org.springframework.scheduling.annotation.Scheduled}.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.scheduled.skip-pattern</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">org.springframework.cloud.netflix.hystrix.stream.HystrixStreamTask</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pattern for the fully qualified name of a class that should be skipped.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.supports-join</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">True means the tracing system supports sharing a span ID between a client and server.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.trace-id128</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">When true, generate 128-bit trace IDs instead of 64-bit ones.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.additional-skip-pattern</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Additional pattern for URLs that should be skipped in tracing. This will be appended to the {@link SleuthWebProperties#skipPattern}.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.client.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable interceptor injecting into {@link org.springframework.web.client.RestTemplate}.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.client.skip-pattern</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pattern for URLs that should be skipped in client side tracing.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">When true enables instrumentation for web applications.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.exception-logging-filter-enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Flag to toggle the presence of a filter that logs thrown exceptions.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.exception-throwing-filter-enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Flag to toggle the presence of a filter that logs thrown exceptions. @deprecated use {@link #exceptionLoggingFilterEnabled}</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.filter-order</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Order in which the tracing filters should be registered. Defaults to {@link TraceHttpAutoConfiguration#TRACING_FILTER_ORDER}.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.ignore-auto-configured-skip-patterns</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">If set to true, auto-configured skip patterns will be ignored. @see TraceWebAutoConfiguration</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.web.skip-pattern</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">/api-docs.<strong>|/swagger.</strong>|.<strong>\.png|.</strong>\.css|.<strong>\.js|.</strong>\.html|/favicon.ico|/hystrix.stream</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pattern for URLs that should be skipped in tracing.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.sleuth.zuul.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enable span information propagation when using Zuul.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.activemq.message-max-bytes</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">100000</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Maximum number of bytes for a given message with spans sent to Zipkin over ActiveMQ.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.activemq.queue</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">zipkin</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Name of the ActiveMQ queue where spans should be sent to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.base-url</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="http://localhost:9411/" class="bare">localhost:9411/</a></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">URL of the zipkin query server instance. You can also provide the service id of the Zipkin server if Zipkin&#8217;s registered in service discovery (e.g. <a href="https://zipkinserver/" class="bare">zipkinserver/</a>).</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.compression.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.discovery-client-enabled</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">If set to {@code false}, will treat the {@link ZipkinProperties#baseUrl} as a URL always.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enables sending spans to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.encoder</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Encoding type of spans sent to Zipkin. Set to {@link SpanBytesEncoder#JSON_V1} if your server is not recent.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.kafka.topic</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">zipkin</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Name of the Kafka topic where spans should be sent to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.locator.discovery.enabled</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Enabling of locating the host name via service discovery.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.message-timeout</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">1</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Timeout in seconds before pending spans will be sent in batches to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.rabbitmq.addresses</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Addresses of the RabbitMQ brokers used to send spans to Zipkin</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.rabbitmq.queue</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">zipkin</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Name of the RabbitMQ queue where spans should be sent to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.sender.type</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Means of sending spans to Zipkin.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">spring.zipkin.service.name</p></td>
<td class="tableblock halign-left valign-top"></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">The name of the service, from which the Span was sent via HTTP, that should appear in Zipkin.</p></td>
</tr>
</tbody>
</table>
</div>
</div>
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<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#features">1. Features</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="features"><a class="anchor" href="#features"></a><a class="link" href="#features">1. Features</a></h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p>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>
<div class="listingblock">
<div class="content">
<pre>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>
</div>
</div>
<div class="paragraph">
<p>Notice the <code>[appname,traceId,spanId,exportable]</code> entries from the MDC:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><strong><code>spanId</code></strong>: The ID of a specific operation that took place.</p>
</li>
<li>
<p><strong><code>appname</code></strong>: The name of the application that logged the span.</p>
</li>
<li>
<p><strong><code>traceId</code></strong>: The ID of the latency graph that contains the span.</p>
</li>
<li>
<p><strong><code>exportable</code></strong>: Whether the log should be exported to Zipkin.
When would you like the span not to be exportable?
When you want to wrap some operation in a Span and have it written to the logs only.</p>
</li>
</ul>
</div>
</li>
<li>
<p>Provides an abstraction over common distributed tracing data models: traces, spans (forming a DAG), annotations, and key-value annotations.
Spring Cloud Sleuth is loosely based on HTrace but is compatible with Zipkin (Dapper).</p>
</li>
<li>
<p>Sleuth records timing information to aid in latency analysis.
By using sleuth, you can pinpoint causes of latency in your applications.</p>
</li>
<li>
<p>Sleuth is written to not log too much and to not cause your production application to crash.
To that end, Sleuth:</p>
<div class="ulist">
<ul>
<li>
<p>Propagates structural data about your call graph in-band and the rest out-of-band.</p>
</li>
<li>
<p>Includes opinionated instrumentation of layers such as HTTP.</p>
</li>
<li>
<p>Includes a sampling policy to manage volume.</p>
</li>
<li>
<p>Can report to a Zipkin system for query and visualization.</p>
</li>
</ul>
</div>
</li>
<li>
<p>Instruments common ingress and egress points from Spring applications (servlet filter, async endpoints, rest template, scheduled actions, message channels, Zuul filters, and Feign client).</p>
</li>
<li>
<p>Sleuth includes default logic to join a trace across HTTP or messaging boundaries.
For example, HTTP propagation works over Zipkin-compatible request headers.</p>
</li>
<li>
<p>Sleuth can propagate context (also known as baggage) between processes.
Consequently, if you set a baggage element on a Span, it is sent downstream to other processes over either HTTP or messaging.</p>
</li>
<li>
<p>Provides a way to create or continue spans and add tags and logs through annotations.</p>
</li>
<li>
<p>If <code>spring-cloud-sleuth-zipkin</code> is on the classpath, the app generates and collects Zipkin-compatible traces.
By default, it sends them over HTTP to a Zipkin server on localhost (port 9411).
You can configure the location of the service by setting <code>spring.zipkin.baseUrl</code>.</p>
<div class="ulist">
<ul>
<li>
<p>If you depend on <code>spring-rabbit</code>, your app sends traces to a RabbitMQ broker instead of HTTP.</p>
</li>
<li>
<p>If you depend on <code>spring-kafka</code>, and set <code>spring.zipkin.sender.type: kafka</code>, your app sends traces to a Kafka broker instead of HTTP.</p>
</li>
</ul>
</div>
</li>
</ul>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<i class="fa icon-caution" title="Caution"></i>
</td>
<td class="content">
<code>spring-cloud-sleuth-stream</code> is deprecated and should no longer be used.
</td>
</tr>
</table>
</div>
<div class="ulist">
<ul>
<li>
<p>Spring Cloud Sleuth is <a href="https://opentracing.io/">OpenTracing</a> compatible.</p>
</li>
</ul>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
The SLF4J MDC is always set and logback users immediately see the trace and span IDs in logs per the example
shown earlier.
Other logging systems have to configure their own formatter to get the same result.
The default is as follows:
<code>logging.pattern.level</code> set to <code>%5p [${spring.zipkin.service.name:${spring.application.name:-}},%X{X-B3-TraceId:-},%X{X-B3-SpanId:-},%X{X-Span-Export:-}]</code>
(this is a Spring Boot feature for logback users).
If you do not use SLF4J, this pattern is NOT automatically applied.
</td>
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<html lang="en">
<head>
<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Untitled</title>
<link rel="stylesheet" href="css/spring.css">
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</head>
<body class="book">
<div id="header">
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Add Sleuth to your classpath:</p>
</div>
<div class="paragraph">
<p>Maven</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;dependencyManagement&gt;
&lt;dependencies&gt;
&lt;dependency&gt;
&lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
&lt;artifactId&gt;spring-cloud-sleuth&lt;/artifactId&gt;
&lt;version&gt;${spring-cloud-sleuth.version}&lt;/version&gt;
&lt;type&gt;pom&lt;/type&gt;
&lt;scope&gt;import&lt;/scope&gt;
&lt;/dependency&gt;
&lt;/dependencies&gt;
&lt;/dependencyManagement&gt;
&lt;dependencies&gt;
&lt;dependency&gt;
&lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
&lt;artifactId&gt;spring-cloud-starter-sleuth&lt;/artifactId&gt;
&lt;/dependency&gt;
&lt;/dependencies&gt;</code></pre>
</div>
</div>
<div class="paragraph">
<p>Gradle</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-groovy hljs" data-lang="groovy">buildscript {
dependencies {
classpath "io.spring.gradle:dependency-management-plugin:0.5.2.RELEASE"
}
}
apply plugin: "io.spring.dependency-management"
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-sleuth:${springCloudSleuthVersion}"
}
}
dependencies {
compile 'org.springframework.cloud:spring-cloud-starter-sleuth'
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>As long as Spring Cloud Sleuth is on the classpath any Spring Boot application will generate trace data:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@SpringBootApplication
@RestController
public class Application {
private static Logger log = LoggerFactory.getLogger(DemoController.class);
@RequestMapping("/")
public String home() {
log.info("Handling home");
return "Hello World";
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Run this app and then hit the home page. You will see traceId and spanId populated in the logs. If this app calls out to another one (e.g. with <code>RestTemplate</code>) it will send the trace data in headers and if the receiver is another Sleuth app you will see the trace continue there.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Instead of logging the request in the handler explicitly, you could set <code>logging.level.org.springframework.web.servlet.DispatcherServlet=DEBUG</code></p>
</li>
<li>
<p>If you use Zipkin (up till 2.1.x), configure the probability of spans exported by setting <code>spring.sleuth.sampler.probability</code> (default: 0.1, which is 10 percent). Otherwise, you might think that Sleuth is not working because it omits some spans. Starting from 2.2.0, Sleuth will default to rate limited sampler. That means that it will sample up to 1000 transactions per second.</p>
</li>
<li>
<p>Set <code>spring.application.name=bar</code> (for instance) to see the service name as well as the trace and span ids.</p>
</li>
</ul>
</div>
</div>
</div>
</div>
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<script src="js/highlight/highlight.min.js"></script>
<script>hljs.initHighlighting()</script>
</body>
</html>

144
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Features</title>
<link rel="stylesheet" href="css/spring.css">
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</head>
<body class="book toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_features">Features</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Spring Cloud Sleuth implements a distributed tracing solution for Spring Cloud, borrowing heavily from <a href="https://research.google.com/pubs/pub36356.html">Dapper</a>, <a href="https://github.com/openzipkin/zipkin">Zipkin</a> and HTrace. For most users Sleuth should be invisible, and all your interactions with external systems should be instrumented automatically. You can capture data simply in logs, or by sending it to a remote collector service.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_features"><a class="link" href="#_features">Features</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>A Span is the basic unit of work. For example, sending an RPC is a new span, as is sending a response to an RPC. Span’s are identified by a unique 64-bit ID for the span and another 64-bit ID for the trace the span is a part of. Spans also have other data, such as descriptions, key-value annotations, the ID of the span that caused them, and process ID’s (normally IP address). Spans are started and stopped, and they keep track of their timing information. Once you create a span, you must stop it at some point in the future. A set of spans forming a tree-like structure called a Trace. For example, if you are running a distributed big-data store, a trace might be formed by a put request.</p>
</div>
<div class="paragraph">
<p>Spring Cloud Sleuth features:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>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.</p>
</li>
<li>
<p>Provides an abstraction over common distributed tracing data models: traces, spans (forming a DAG), annotations, key-value annotations. Loosely based on HTrace, but Zipkin (Dapper) compatible.</p>
</li>
<li>
<p>Instruments common ingress and egress points from Spring applications (servlet filter, rest template, scheduled actions, message channels, zuul filters, feign client).</p>
</li>
<li>
<p>If <code>spring-cloud-sleuth-zipkin</code> is available then the app will generate and collect Zipkin-compatible traces via HTTP. By default it sends them to a Zipkin collector service on localhost (port 9411). Configure the location of the service using <code>spring.zipkin.baseUrl</code>.</p>
</li>
</ul>
</div>
</div>
</div>
</div>
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<script src="js/highlight/highlight.min.js"></script>
<script>hljs.initHighlighting()</script>
</body>
</html>

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Original One Light Syntax theme from https://github.com/atom/one-light-syntax
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