Since using Spring Batch 5.0, I have an issue when running my app (ToolnameApplication). I can't find out why because I didn't used any of BatchConfigurer methods. Here's the error: ...

If you face following exception while deploying your application in tomcat:org.apache.catalina.lifecycleexception: failed to start component [standardengine [catalina].standardhost ...

Then changing it to api (which is not deprecated) would also fix the issue, but I agree that it's strange. That said, it's likely not an issue in kotlinx.coroutines but in Kotlin, which has an issue ...