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Migration from Eclipselink 3.0.2 to 4.0.0 [message #1857258]

Thu, 26 January 2023 20:31

Ariel Secreto

Messages: 1
Registered: January 2023

Junior Member

I updated the EclipseLink libraries from version 3.0.2 to 4.0.0 in a Java project with MySQL.
When trying to connect to the database I get this error:

java.lang.NoClassDefFoundError: org/eclipse/persistence/json/JsonPlatform

What archive jar is this class in? Why can't the compiler find it? Thank you.

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Re: Migration from Eclipselink 3.0.2 to 4.0.0 [message #1857268 is a reply to message #1857258]

Fri, 27 January 2023 09:25

Radek Felcman

Messages: 16
Registered: March 2021

Junior Member

Hello,

org.eclipse.persistence.json.JsonPlatform

is new class introduced by
https://github.com/eclipse-ee4j/eclipselink/pull/1389 into EclipseLink 4.x version.
It's available in following artifact:
org.eclipse.persistence:org.eclipse.persistence.json:4.0.0
https://search.maven.org/artifact/org.eclipse.persistence/org.eclipse.persistence.json/4.0.0/jar

About mentioned error:

java.lang.NoClassDefFoundError: org/eclipse/persistence/json/JsonPlatform

I'd like now:
1. Full error stack which leads into this exception
2. Your dependencies. Classpath | Modulepath and list of EclipseLink dependencies
3. Platform class, if specified in the

persistence.xml

file

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