now that we have Ktor 3.0.0 stable, are there any ...

# ktor

[Hristijan]

now that we have Ktor 3.0.0 stable, are there any updates on supporting open telemetry soon, we can't roll out to production currently without this

https://youtrack.jetbrains.com/issue/KTOR-7515/Add-support-for-OpenTelemetry-plugin-for-3.x.x-versions

[e5l]

https://github.com/open-telemetry/opentelemetry-java-instrumentation/pull/12453

[Carlos Garcia]

Hi I’m trying to upgrade to Ktor 3.0.1 and with it to use the new opentelemetry-ktor-3.0 . I’m using

io.opentelemetry.instrumentation:opentelemetry-ktor-3.0:2.10.0-alpha

with the agent

io.opentelemetry.javaagent:opentelemetry-javaagent:2.10.0

and I’m getting a weird exception using io.ktor:ktor-server-auth for the OAuth flow when trying to exchange the access code for the access token

Authentication failed for /SOME-URL-I-CANT-SHARE with error Failed to request OAuth2 access token due to java.lang.ClassCastException: class io.opentelemetry.javaagent.instrumentation.opentelemetryapi.context.AgentContextWrapper cannot be cast to class io.opentelemetry.javaagent.shaded.io.opentelemetry.context.Context (io.opentelemetry.javaagent.instrumentation.opentelemetryapi.context.AgentContextWrapper is in unnamed module of loader 'app'; io.opentelemetry.javaagent.shaded.io.opentelemetry.context.Context is in unnamed module of loader 'bootstrap')

do you have any idea what could be causing the issue?

[e5l]

@Maria Skripchenko

[Carlos Garcia]

BTW removing

install(KtorClientTracing) {
        setOpenTelemetry(openTelemetry)
    }

makes that exception go away, so it should be something to do with the client tracing

[Carlos Garcia]

also the issue it is not directly related to io.ktor:ktor-server-auth if I disable the plugin any calls from my http client end up failing having the same ClassCastException

[Maria Skripchenko]

@Carlos Garcia Can you please create an issue in YouTrack https://youtrack.jetbrains.com/newIssue?project=KTOR

[Carlos Garcia]

https://youtrack.jetbrains.com/issue/KTOR-7798/opentelemetry-ktor-3.0-issue-with-httpClient, I’ve added a link to a github repo with a sample app to be able to reproduce the issue

[Carlos Garcia]

BTW I just tested it with the newer version of opentelemetry-ktor-3.0 (2.14.0) and the issue seems to be fixed

[e5l]

thank you for the update!

[Carlos Garcia]

sorry I take it back, the issue still exists, I forgot the issue was when doing

install(KtorClientTelemetry) {
        setOpenTelemetry(openTelemetry)
    }

in the new service I tested it, it didn’t use it

[e5l]

reverted

[e5l]

thanks for the update again!

[Carlos Garcia]

I did a quick googling to see if there were other people with similar issues and I’ve found https://github.com/open-telemetry/opentelemetry-java-instrumentation/discussions/7485 and https://github.com/open-telemetry/opentelemetry-java-instrumentation/issues/11042

[Carlos Garcia]

perhaps the plugin needs to check if an agent is running to pull the right context