Annoying message while using OpenTelemetry: msg: defaulted common supertype for type <...> due to err:java.lang.IllegalStateException: ClassLoader is null?

[dmitryb-dev]

I'm getting a lot of messages like this:

ebean-enhance> cls: io/opentelemetry/javaagent/shaded/io/opentelemetry/context/LazyStorage msg: defaulted common supertype for type1:io/opentelemetry/javaagent/shaded/io/opentelemetry/context/StrictContextStorage type2:io/opentelemetry/javaagent/shaded/io/opentelemetry/context/ContextStorage due to err:java.lang.IllegalStateException: ClassLoader is null?

Probably io.opentelemetry should be added to IgnoreClassHelper.java?

[rbygrave]

Well, yes we could and probably should add io.opentelemetry to the ignore list - but note that is just a performance feature (ignoring packages that we reasonably know should never contain entity beans, query beans or transactional methods).

It would be good to try and reproduce this issue first it we can. That is, the ClassLoader is null? part more suggests this is more a bug.

Are you able to create a test case? Perhaps a Fork/PR of https://github.com/ebean-orm-examples/example-minimal ?

I am unable to reproduce by for example, adding dependency opentelemetry-sdk and code OpenTelemetrySdk openTelemetrySdk = OpenTelemetrySdk.builder().buildAndRegisterGlobal();

... makes we wonder if there is something interesting with the opentelemetry agent.

[rbygrave]

Refer to: ebean-orm/ebean-agent#183

[rbygrave]

Ok, I'll close this for now as fixed in 13.6.1 with ebean-agent ignoring io.opentelemetry.

If we can get a test case that reproduces with the ClassLoader is null? error we can reopen or create a new one and look at that.