I think your guess is good! If you are in control of these libraries I'd recommend that you not use :aot :all when creating the library jars.

thanks @UE21H2HHD it's the second time you're jumping to help, I might have to send your a beer 🙂 some libraries are in my control, some are not. any idea how do I find the culprit library? I went through some manually, and checked lein deps, but no luck so far

Ah yeah, MrAnderson stuff right @U04H5V7URR9? Hiya! I think aot gunk in fullcontact libs was causing you grief there as well.

So if you are actively working on these libs, they'll likely be downloaded to your local maven repository. If you are on mac or linux this will be ~/.m2/repository/. You can use unzip -l or jar tf to take a peek at what files are in the jars, I used unzip -l above on fullcontact/full.core v1.1.1 which happened to be in my local maven repo.

The .class files are likely all due to aot compilation of Clojure source. And that's not good, because the result is that it brings in a specific compiled version of a dependency which will often result in a conflict of that same dependency brought from a different lib.

There are times when you'll need .class files in a lib jar. Like when your lib has some Java source, you'll need to compile those Java sources into .class files. But, for a lib, including Clojure compiled sources is going to cause grief.

For an application uberjar, for faster startup, some folks decide to :aot :all. This does not cause conflicts because nothing is using the application as a lib dependency.

I see, so I guess I'll update all the libs that I can change removing aot and checking to see if the issue resolved appreciate the guidance

Yeah, I think that would solve at least one big problem, @U04H5V7URR9. And then maybe you can focus on more interesting problems!

I wish

I've been in dependency hell for months

Getting rid of :aot :all for your libs will solve many, if not all, of those problems for you.

Well, and then there are just sometimes general dependency headaches from libs like jackson. But you'll be well on your way, you'll find that missing spring in your step, and you might even occasionally and uncontrollably break out into song.

:rolling_on_the_floor_laughing: :rolling_on_the_floor_laughing: :rolling_on_the_floor_laughing:

hey @UE21H2HHD I removed aot from all of our libraries and so far it seemed to fix issues with two services that had been upgraded to the new library versions! thank you so much

I thought I heard you singing, congrats on finding a better path!