Appendix A: Common application properties

Various properties can be specified inside your application.properties file, inside your application.yml 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.

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.
Name Default Description

spring.sleuth.annotation.enabled

true

spring.sleuth.async.configurer.enabled

true

Enable default AsyncConfigurer.

spring.sleuth.async.enabled

true

Enable instrumenting async related components so that the tracing information is passed between threads.

spring.sleuth.async.ignored-beans

List of {@link java.util.concurrent.Executor} bean names that should be ignored and not wrapped in a trace representation.

spring.sleuth.baggage-keys

List of baggage key names that should be propagated out of process. These keys will be prefixed with baggage 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)

spring.sleuth.enabled

true

spring.sleuth.feign.enabled

true

Enable span information propagation when using Feign.

spring.sleuth.feign.processor.enabled

true

Enable post processor that wraps Feign Context in its tracing representations.

spring.sleuth.grpc.enabled

true

Enable span information propagation when using GRPC.

spring.sleuth.http.enabled

true

spring.sleuth.http.legacy.enabled

false

Enables the legacy Sleuth setup.

spring.sleuth.hystrix.strategy.enabled

true

Enable custom HystrixConcurrencyStrategy that wraps all Callable instances into their Sleuth representative - the TraceCallable.

spring.sleuth.hystrix.strategy.passthrough

false

When enabled the tracing information is passed to the Hystrix execution threads but spans are not created for each execution.

spring.sleuth.integration.enabled

true

Enable Spring Integration sleuth instrumentation.

spring.sleuth.integration.patterns

[!hystrixStreamOutput*, *]

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.

spring.sleuth.integration.websockets.enabled

true

Enable tracing for WebSockets.

spring.sleuth.keys.http.headers

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.

spring.sleuth.keys.http.prefix

http.

Prefix for header names if they are added as tags.

spring.sleuth.local-keys

Same as {@link #propagationKeys} except that this field is not propagated to remote services. @see brave.propagation.ExtraFieldPropagation.FactoryBuilder#addRedactedField(String)

spring.sleuth.log.slf4j.enabled

true

Enable a {@link Slf4jScopeDecorator} that prints tracing information in the logs.

spring.sleuth.log.slf4j.whitelisted-mdc-keys

A list of keys to be put from baggage to MDC.

spring.sleuth.messaging.enabled

false

Should messaging be turned on.

spring.sleuth.messaging.jms.enabled

false

spring.sleuth.messaging.jms.remote-service-name

jms

spring.sleuth.messaging.kafka.enabled

false

spring.sleuth.messaging.kafka.remote-service-name

kafka

spring.sleuth.messaging.rabbit.enabled

false

spring.sleuth.messaging.rabbit.remote-service-name

rabbitmq

spring.sleuth.opentracing.enabled

true

spring.sleuth.propagation-keys

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. <p> Note: {@code fieldName} will be implicitly lower-cased. @see brave.propagation.ExtraFieldPropagation.FactoryBuilder#addField(String)

spring.sleuth.propagation.tag.enabled

true

Enables a {@link TagPropagationFinishedSpanHandler} that adds extra propagated fields to span tags.

spring.sleuth.propagation.tag.whitelisted-keys

A list of keys to be put from extra propagation fields to span tags.

spring.sleuth.reactor.enabled.enabled

true

When true enables instrumentation for reactor.

spring.sleuth.redis.enabled

true

Enable span information propagation when using Redis.

spring.sleuth.rxjava.schedulers.hook.enabled

true

Enable support for RxJava via RxJavaSchedulersHook.

spring.sleuth.rxjava.schedulers.ignoredthreads

[HystrixMetricPoller, ^RxComputation.*$]

Thread names for which spans will not be sampled.

spring.sleuth.sampler.probability

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’s no support for 0.1% of the traces).

spring.sleuth.sampler.rate

10

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}.

spring.sleuth.scheduled.enabled

true

Enable tracing for {@link org.springframework.scheduling.annotation.Scheduled}.

spring.sleuth.scheduled.skip-pattern

org.springframework.cloud.netflix.hystrix.stream.HystrixStreamTask

Pattern for the fully qualified name of a class that should be skipped.

spring.sleuth.supports-join

true

True means the tracing system supports sharing a span ID between a client and server.

spring.sleuth.trace-id128

false

When true, generate 128-bit trace IDs instead of 64-bit ones.

spring.sleuth.web.additional-skip-pattern

Additional pattern for URLs that should be skipped in tracing. This will be appended to the {@link SleuthWebProperties#skipPattern}.

spring.sleuth.web.client.enabled

true

Enable interceptor injecting into {@link org.springframework.web.client.RestTemplate}.

spring.sleuth.web.client.skip-pattern

Pattern for URLs that should be skipped in client side tracing.

spring.sleuth.web.enabled

true

When true enables instrumentation for web applications.

spring.sleuth.web.exception-logging-filter-enabled

true

Flag to toggle the presence of a filter that logs thrown exceptions.

spring.sleuth.web.exception-throwing-filter-enabled

true

Flag to toggle the presence of a filter that logs thrown exceptions. @deprecated use {@link #exceptionLoggingFilterEnabled}

spring.sleuth.web.filter-order

Order in which the tracing filters should be registered. Defaults to {@link TraceHttpAutoConfiguration#TRACING_FILTER_ORDER}.

spring.sleuth.web.ignore-auto-configured-skip-patterns

false

If set to true, auto-configured skip patterns will be ignored. @see TraceWebAutoConfiguration

spring.sleuth.web.skip-pattern

/api-docs.|/swagger.|.\.png|.\.css|.\.js|.\.html|/favicon.ico|/hystrix.stream

Pattern for URLs that should be skipped in tracing.

spring.sleuth.zuul.enabled

true

Enable span information propagation when using Zuul.

spring.zipkin.activemq.message-max-bytes

100000

Maximum number of bytes for a given message with spans sent to Zipkin over ActiveMQ.

spring.zipkin.activemq.queue

zipkin

Name of the ActiveMQ queue where spans should be sent to Zipkin.

spring.zipkin.base-url

localhost:9411/

URL of the zipkin query server instance. You can also provide the service id of the Zipkin server if Zipkin’s registered in service discovery (e.g. zipkinserver/).

spring.zipkin.compression.enabled

false

spring.zipkin.discovery-client-enabled

If set to {@code false}, will treat the {@link ZipkinProperties#baseUrl} as a URL always.

spring.zipkin.enabled

true

Enables sending spans to Zipkin.

spring.zipkin.encoder

Encoding type of spans sent to Zipkin. Set to {@link SpanBytesEncoder#JSON_V1} if your server is not recent.

spring.zipkin.kafka.topic

zipkin

Name of the Kafka topic where spans should be sent to Zipkin.

spring.zipkin.locator.discovery.enabled

false

Enabling of locating the host name via service discovery.

spring.zipkin.message-timeout

1

Timeout in seconds before pending spans will be sent in batches to Zipkin.

spring.zipkin.rabbitmq.queue

zipkin

Name of the RabbitMQ queue where spans should be sent to Zipkin.

spring.zipkin.sender.type

Means of sending spans to Zipkin.

spring.zipkin.service.name

The name of the service, from which the Span was sent via HTTP, that should appear in Zipkin.