Exception Stack in Open Telemetry Agent

[indrabasak]

Describe the bug
A clear and concise description of what the bug is.
Encountered an exception while instrumenting a Java application that uses RxJava library version 2.

Steps to reproduce
If possible, provide a recipe for reproducing the error.
Yes, any application that RxJava library version 2.

What did you expect to see?
Was expecting our Spring Boot service to work as designed.

What did you see instead?
Encountered an exception stack trace while calling a REST endpoint,
Caused by: java.lang.NoSuchFieldError: qs at io.opentelemetry.javaagent.shaded.instrumentation.rxjava2.TracingObserver.requestFusion(TracingObserver.java:67) ~[?:?] at io.reactivex.internal.operators.observable.ObservableFlatMap$InnerObserver.onSubscribe(ObservableFlatMap.java:543) ~[rxjava-2.2.14.jar!/:?] at io.reactivex.internal.observers.BasicFuseableObserver.onSubscribe(BasicFuseableObserver.java:66) ~[rxjava-2.2.14.jar!/:?]

What version are you using?
Java agent version 1.1.0

Environment
Compiler: OpenJDK 11.0.10
OS: Mac OS X 10.15.7 BuildVersion: 19H1323
Runtime (if different from JDK above):
OS (if different from OS compiled on):

Additional context
Add any other context about the problem here.
There was no exception once I upgraded RxJava library version from 2 to 3.

[mateuszrzeszutek]

Hey @indrabasak,
This issue was already fixed in the 1.2.0 javaagent. See the previous issue that reported it: #2819
Please try using a newer javaagent version, this problem should be fixed by just that.