Spring Boot JPA error: Unable to extract JDBC value for position `7`

Question

Trying to learn how to use Spring Boot (3.0.2).

I've created Spring Boot project with Intellij Idea. The enitites and the repository I've created with JPA Buddy. Controller is annotated @RestController

Intellij Idea doesn't report any problems and the App starting correctly, but then I invoke in browser localhost:9023/customers I get the error:

2023-02-02T18:40:44.792+02:00 ERROR 27700 --- [nio-9023-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: org.springframework.orm.jpa.JpaSystemException: Unable to extract JDBC value for position `7`] with root cause

org.xml.sax.SAXParseException: Premature end of file.

with long stackstrace following.

Googling the message "Unable to extract JDBC value for position" doesn't point to the explanation what this error mean.

Answer 1

Where was in one table two XML fields (MS SQL Server). JPA Buddy assigns their type as Map. For quick solution I've changed them to String.