[SOLVED] Different TraceId's are generated in Micrometer for single HTTP request

Different TraceId's are generated in Micrometer for single HTTP request

I am recently trying to upgrade spring-boot version 2.7.3 and 2.7.10 to 3.1.0. Since spring-cloud-sleuth is not supported by spring-boot v3.x.x, we have to use micrometer for distributed tracing. However, the traceId is different in both the service but with sleuth it was same.

I have added below dependencies in pom.xml:

    <dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-tracing-bridge-brave</artifactId>
    <version>1.1.1</version>
    </dependency>
    <dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>context-propagation</artifactId>
    <version>1.0.3</version>
    </dependency>
    <dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-observation</artifactId>
    </dependency>

and updated the imports of Tracer to io.micrometer.tracing.Tracer.

When I am sending request from postman to Service A which calls service B(using restTemplate), in the logs I can see the traceId's are different. TraceId is extracted using below code:

    @Autowired 
    io.micrometer.tracing.Tracer tracer;
    String traceId = tracer.currentSpan().context().traceId();

Can anyone please help what is that I am missing that the traceId's are different. Earlier with spring-cloud-sleuth the X-B3-TraceId/ SpanId headers were added automatically but they are not added with micrometer. Do I need to add them manually and if so, then what should be the name of these headers? Thanks in advance!!

Solution

Please check that RestTemplate that you are using is created with RestTemplateBuilder like below.

@Configuration public class Configurator {

@Bean
public RestTemplate getRestTemplate(RestTemplateBuilder builder) {
    return builder.build();
}

}

This is explained by Sergey Kargopolov in article: https://www.appsdeveloperblog.com/micrometer-and-zipkin-in-spring-boot/