When using org.springframework.cloud:spring-cloud-gcp-starter-trace:1.0.0.RELEASE and running my integration tests locally I get this error message:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stackdriverSender' defined in class path resource [org/springframework/cloud/gcp/autoconfigure/trace/StackdriverTraceAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [zipkin2.reporter.Sender]: Factory method 'stackdriverSender' threw exception; nested exception is java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
This is totally understandable since this environment variable is not present locally and I don't want to use Sleuth/Stackdriver tracing when running the tests. I've looked in the reference documentation but I can only seem to find information on how to disable Sleuth for specific integration points such as RxJava, RestTemplate etc. But how can I disable Sleuth entirely?
I've tried setting spring.sleuth.enabled=false but this doesn't seem to make any difference.
I actually found the answer by looking at the source for the StackdriverTraceAutoConfiguration class. The way to solve it if using GCP is to set spring.cloud.gcp.trace.enabled=false. This disables tracing for all integration points.