Lettuce 6.2.2.RELEASE Auto-Instrumentation Error

[Taragos]

Hello,

I am currently trying to use the auto-instrumentation of the java agent to capture my lettuce Redis calls, but I am running into an error.

Whenever the lettuce client is trying to call the setex async command, the application runs into an error loop.

java.lang.ClassCastException: class java.lang.String cannot be cast to class [B (java.lang.String and [B are in module java.base of loader 'bootstrap')

The stack trace is sadly not very helpful, with the last recorded call pointing to an RedisCodec.encodeValue() function, which I can't debug since its breakpoint is never triggered.

Did anyone else come across this or a similar error?

[mateuszrzeszutek]

Hey @Taragos ,

This looks like a bug, can you create an issue for this? Please include a reproduction scenario, or, at the very least, the lettuce call that throws.

[trajano]

Does that mean the automatic instrumentation should work with Lettuce Core 6.x? Or does it only go to 5.x because I only see up to 5.x here

https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/lettuce

[mateuszrzeszutek]

It should work with 6.x.
In general, the instrumentation module names only contain the minimum supported version; the table here lists the full information about supported versions and in some cases you can find limitations there.

[trajano]

Unfortunately I don't see it working on a simple app that uses Spring Session with Redis data store

[mateuszrzeszutek]

Please open a new bug, describe what you expected and what actually happens, and add a link to your app.

[trajano]

#9812