Jackson `ArrayNode` cannot be cast to `java.util.Collection` in `KotlinSerializationJsonHttpMessageConverter`

[zhangwei911]

While using kotlin-serialization-json-jvm:1.7.3 with com.fasterxml.jackson.core:jackson-datebind:2.15.3 in spring-web:5.3.39,
org.springframework.http.converter.json.KotlinSerializationJsonHttpMessageConverter.encode() will cause com.fasterxml.jackson.databind.node.ArrayNode cannot be cast to java.util.Collection in the line String json = this.json.encodeToString(serializer, object);.

[snicoll]

The OSS support for Spring Framework 5.x has ended, and your report is not actionable. If you want support, please take the time to upgrade to a supported version. If you can still reproduce the problem, we'll need a small sample we can run ourselves to reproduce it.

[spring-projects-issues]

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

[spring-projects-issues]

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.