# server

Partho Paul

06/21/2022, 5:13 AM
Hi everyone, I’m using ktor and dynamodb for my backend project. I’m trying to fetch data from db using the below piece of code:
Copy code
getDynamoDbClient().use { ddb ->
                return@use ddb.getItem(dbRequest)
Upon running this, I’m getting
java.lang.IncompatibleClassChangeError: Found interface kotlin.time.TimeMark, but class was expected
error. I’m doing it as it’s shown in Am I doing anything wrong? Kotlin version: 1.7.0, Ktor version: 2.0.2, aws version: 0.16.0 TIA
👀 2

itzik kasovitch

06/21/2022, 5:28 AM
I think it's a breaking change. Saw something similar in kotest when I tried to move to Kotlin 1.7.

Partho Paul

06/21/2022, 5:36 AM
@itzik kasovitch Yeah, just saw that issue. Anyway, I’ve created an issue for aws here
👍 1

Landry Norris

06/23/2022, 6:08 PM
The release notes for 1.7.0 note that time related classes are now inline classes to improve performance. It is interesting that the error notes it as an interface, however.

Alan B

06/24/2022, 4:21 PM
I can’t believe that the time apis are still marked as @ExperimentalTime (since 1.3). This needs to become stable at some point.