Missing method error when trying to use otel

[jimshowalter]

`
springDependencyManagementVerson=1.0.11.RELEASE
sleuthVersion=3.0.2
sleuthOtelVersion=1.0.0-M7
springCloudReleaseTrainVersion=2020.0.2

plugins {
id "io.spring.dependency-management" version "${springDependencyManagementVerson}"
}

dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudReleaseTrainVersion}"
mavenBom "org.springframework.cloud:spring-cloud-sleuth-otel-dependencies:${sleuthOtelVersion}"
}
}

dependencies {
...
implementation("org.springframework.cloud:spring-cloud-sleuth-zipkin:${sleuthVersion}")
implementation("org.springframework.cloud:spring-cloud-starter-sleuth:${sleuthVersion}") {
exclude group: 'org.springframework.cloud', module: 'spring-cloud-sleuth-brave'
}
//implementation("org.springframework.cloud:spring-cloud-sleuth-autoconfigure:${sleuthVersion}")
implementation("org.springframework.cloud:spring-cloud-sleuth-otel-autoconfigure:${sleuthOtelVersion}")`

Launch service:

`

---

APPLICATION FAILED TO START

---

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

org.springframework.cloud.sleuth.autoconfig.zipkin2.ZipkinRestTemplateSenderConfiguration.restTemplateSender(ZipkinRestTemplateSenderConfiguration.java:57)

The following method did not exist:

'java.lang.String org.springframework.cloud.sleuth.zipkin2.ZipkinProperties.getApiPath()'

The method's class, org.springframework.cloud.sleuth.zipkin2.ZipkinProperties, is available from the following locations:

jar:file:/.../code/services/myservice/build/libs/myservice.jar!/BOOT-INF/lib/spring-cloud-sleuth-zipkin-3.0.2.jar!/org/springframework/cloud/sleuth/zipkin2/ZipkinProperties.class

The class hierarchy was loaded from the following locations:

org.springframework.cloud.sleuth.zipkin2.ZipkinProperties: jar:file:/.../code/services/myservice/build/libs/myservice.jar!/BOOT-INF/lib/spring-cloud-sleuth-zipkin-3.0.2.jar!/

Action:

Correct the classpath of your application so that it contains a single, compatible version of org.springframework.cloud.sleuth.zipkin2.ZipkinProperties`

[jimshowalter]

It does that whether implementation("org.springframework.cloud:spring-cloud-sleuth-autoconfigure:${sleuthVersion}") is commented out or uncommented.

[jonatan-ivanov]

You can either use sleuth-zipkin (brave) or sleuth-otel you need to choose which one.

If you want to use Zipkin(Brave) (recommended in prod): https://docs.spring.io/spring-cloud-sleuth/docs/current/reference/htmlsingle/#how-to-set-up-sleuth-with-brave-zipkin-http
If you want to use OTel (not recommended in prod): https://github.com/spring-cloud-incubator/spring-cloud-sleuth-otel#quick-start

I'm closing this issue because of this, if I misunderstand something please let me know and I can reopen it.

[jimshowalter]

We excluded brave. We only want what's compatible with otel. We don't seem to be able to achieve that. We had already followed the instructions in https://github.com/spring-cloud-incubator/spring-cloud-sleuth-otel#quick-start (converting them to Gradle, but otherwise it should be the same).

[jonatan-ivanov]

I saw you excluded brave but you included org.springframework.cloud:spring-cloud-sleuth-zipkin :)

If you take another look at https://github.com/spring-cloud-incubator/spring-cloud-sleuth-otel#quick-start you will see these:

spring-boot-starter-web
spring-cloud-starter-sleuth; exclude: spring-cloud-sleuth-brave
spring-cloud-sleuth-otel-autoconfigure

zipkin is not there and it should not be, you should either use Zipkin (Brave) or OTel, the two does not work together.
A not very good but somewhat similar example for this could be: you need to decide if you use log4j or logback for logging.

[huggsboson]

Hi @jonatan-ivanov: I just want to say thank you for your quick responses!

I think we must have gotten confused by this doc page:
https://spring-cloud-incubator.github.io/spring-cloud-sleuth-otel/docs/current/reference/html/howto.html#how-to-set-up-sleuth-with-otel-zipkin-http

If you confirm those are in error we can file an issue over there to fix it up.

Just for some context, we're late/early adopters of distributed tracing at our company, and were trying to hop onto the OTeL train to avoid having to switch to another set of libs / headers later. So we were gonna try an push through the growing pains associated with adopting OTel / W3C headers. What we're running into here is we'd like to use:

1. W3C headers for context prop
2. Short term export to a zipkin collector for demo purposes.

I was under the impression that the otel libs would likely support zipkin exports, but maybe the current sleuth-otel doesn't support zipkin exports. I'm curious if the standard sleuth libs support extraction/injection of the W3C headers, my quick searches indicate you do:
https://github.com/spring-cloud/spring-cloud-sleuth/blob/master/spring-cloud-sleuth-brave/src/main/java/org/springframework/cloud/sleuth/brave/bridge/W3CPropagation.java

Thanks again so much for all your help.

[jonatan-ivanov]

Hi @huggsboson
Oh, I see what you are trying to do. Using opentelemetry-exporter-zipkin should work but right now it makes less sense to me because:

• Sleuth-OTel and OTel are not prod ready
• Brave is created by the Zipkin community, it has great Zipkin support
• Sleuth abstracts the instrumentation library (Brave or OTel) away, you can switch between them

Right now, I would not go to prod with OTel.
If you want to, could you please try two things?

1. Do not define versions for libraries (sleuthVersion), just use BOM (springCloudReleaseTrainVersion)
2. Add opentelemetry-exporter-zipkin as you see in the docs: https://spring-cloud-incubator.github.io/spring-cloud-sleuth-otel/docs/current/reference/html/howto.html#how-to-set-up-sleuth-with-otel-zipkin-http

Oh wait, I just realize that the docs does not contain opentelemetry-exporter-zipkin for gradle, it is only there for maven:

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:${releaseTrainVersion}"
        mavenBom "org.springframework.cloud:spring-cloud-sleuth-otel-dependencies:${springCloudSleuthOtelVersion}"
    }
}

dependencies {
    implementation("org.springframework.cloud:spring-cloud-starter-sleuth") {
        exclude group: 'org.springframework.cloud', module: 'spring-cloud-sleuth-brave'
    }
    implementation "org.springframework.cloud:spring-cloud-sleuth-otel-autoconfigure"
    implementation "org.springframework.cloud:spring-cloud-sleuth-zipkin"
}

Could you please try this out any let me know if it works, I'm going to fix the docs accordingly.

[jimshowalter]

Per your earlier comments, aren't these incompatible?:

implementation "org.springframework.cloud:spring-cloud-sleuth-otel-autoconfigure"
implementation "org.springframework.cloud:spring-cloud-sleuth-zipkin"