Problems with Fasterxml 2.10.0 and Springboot 2.2.1

[ksinkar]

I cannot use Faker with my latest Springboot project (2.2.1.RELEASE)

java.lang.NoSuchMethodError: com.fasterxml.jackson.module.kotlin.KotlinModule.<init>(IZZZILkotlin/jvm/internal/DefaultConstructorMarker;)V

	at io.github.serpro69.kfaker.Mapper.<clinit>(Mapper.kt:12)
	at io.github.serpro69.kfaker.FakerService.readCategory(FakerService.kt:121)
	at io.github.serpro69.kfaker.FakerService.load(FakerService.kt:65)
	at io.github.serpro69.kfaker.FakerService.<init>(FakerService.kt:30)
	at io.github.serpro69.kfaker.Faker.<init>(Faker.kt:13)
	at io.github.serpro69.kfaker.Faker.<init>(Faker.kt:12)

I fixed it by upgrading fasterxml to 2.10.1.

[serpro69]

This could be caused by differences in 2.10.0 and 2.10.1

I've had the "need to fix dependencies" thought in the back of my head for awhile now (probably using the shadow plugin), but didn't have time as of late to add this. Feel free to submit a PR if you want.

For now upgrading your dependency seems like the best workaround. Else you can also try to exclude jackson-module-kotlin from faker's dependencies.

[rpmoore]

I'm also encountering the same issue but with Jackson 2.11. Exact same stack trace.

[serpro69]

What springboot version are you using @rpmoore ? Will try to reproduce it.

[rpmoore]

We're not using spring. I also tried down reving Jackson to 2.10.1 and that didn't resolve the issue. I can play with some of the other dependencies to see what it is.

[rpmoore]

Doing a little digging I found this issue FasterXML/jackson-module-kotlin#279

Seems like if you update to 2.10.2 that should resolve some of the issues going forward.

[serpro69]

Thanks for digging that up @rpmoore Will update all of the dependencies and push the change on the weekend. Hopefully that will help.
I've also tried shading the dependencies, but there's no documentation on using gradle shade plugin with kotlin-dsl syntax, so that's still in progress.

[serpro69]

@rpmoore please check if faker version 1.1.2 fixes it. I've bumped jackson dependencies to 2.11.0

[rpmoore]

I'll give it a try today and let you know.

[rpmoore]

That seemed to do the trick for me! I can run my tests without issue now.

[serpro69]

Great, thanks for confirming @rpmoore
Closing this for now. @ksinkar feel free to reopen if this is not fixed for you.

[rpmoore]

Yeah, it's working like a champ now. This has been super helpful!