I am trying to develop an app with a database and i got lots of error like java.lang.IllegalArgumentException: Unsupported class file major version 61 and [EL Severe]: metadata: 2022-01-26 17:43:20.982--ServerSession(422250493)--The database.model.StageEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project. for every entity created through mapping. This is a Maven project so i didn't find any infos about it, only gradle. I work on java 17(17.0.2) and i am not familliar with intellij or Java in general, hopefully i will have someone who might find an answer for my problem. This is my persistence.xml file
<?xml version="1.0" encoding="UTF-8"?>
<persistence-unit name="PersistenceMIP">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>database.model.StageEntity</class>
<class>database.model.StageTeamEntity</class>
<class>database.model.TeamEntity</class>
<class>database.model.UserEntity</class>
<properties>
<property name="eclipselink.jdbc.url" value="jdbc:postgresql://localhost:5432/MIP"/>
<property name="eclipselink.jdbc.driver" value="org.postgresql.Driver"/>
<property name="eclipselink.jdbc.user" value="postgres"/>
<property name="eclipselink.jdbc.password" value="root"/>
</properties>
</persistence-unit>
and this is my pom.xml file
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>MIP1</artifactId> <version>1.0-SNAPSHOT</version> <properties> <maven.compiler.source>17.0.2</maven.compiler.source> <maven.compiler.target>17.0.2</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.openjfx</groupId> <artifactId>javafx-controls</artifactId> <version>17.0.1</version> </dependency> <dependency> <groupId>org.openjfx</groupId> <artifactId>javafx-fxml</artifactId> <version>17.0.1</version> </dependency> <dependency> <groupId>org.eclipse.persistence</groupId> <artifactId>eclipselink</artifactId> <version>2.7.7</version> </dependency> <dependency> <groupId>org.eclipse.persistence</groupId> <artifactId>javax.persistence</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.2.2</version> </dependency>
and here it's a lith with all my warning and errors
enter code here[EL Info]: transaction: 2022-01-26 17:43:20.954--ServerSession(422250493)--property eclipselink.jdbc.user is deprecated, property javax.persistence.jdbc.user should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.959--ServerSession(422250493)--property eclipselink.jdbc.driver is deprecated, property javax.persistence.jdbc.driver should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.96--ServerSession(422250493)--property eclipselink.jdbc.url is deprecated, property javax.persistence.jdbc.url should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.96--ServerSession(422250493)--property eclipselink.jdbc.password is deprecated, property javax.persistence.jdbc.password should be used instead.
[EL Severe]: metadata: 2022-01-26 17:43:20.982--ServerSession(422250493)--The database.model.StageEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.IllegalArgumentException: Unsupported class file major version 61
[EL Severe]: metadata: 2022-01-26 17:43:20.984--ServerSession(422250493)--The database.model.StageEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.ArrayIndexOutOfBoundsException: Index 8 out of bounds for length 0
[EL Severe]: metadata: 2022-01-26 17:43:20.984--ServerSession(422250493)--The database.model.StageTeamEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.IllegalArgumentException: Unsupported class file major version 61
[EL Severe]: metadata: 2022-01-26 17:43:20.985--ServerSession(422250493)--The database.model.StageTeamEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.ArrayIndexOutOfBoundsException: Index 8 out of bounds for length 0
[EL Severe]: metadata: 2022-01-26 17:43:20.985--ServerSession(422250493)--The database.model.TeamEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.IllegalArgumentException: Unsupported class file major version 61
[EL Severe]: metadata: 2022-01-26 17:43:20.985--ServerSession(422250493)--The database.model.TeamEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.ArrayIndexOutOfBoundsException: Index 8 out of bounds for length 0
[EL Severe]: metadata: 2022-01-26 17:43:20.985--ServerSession(422250493)--The database.model.UserEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.IllegalArgumentException: Unsupported class file major version 61
[EL Severe]: metadata: 2022-01-26 17:43:20.986--ServerSession(422250493)--The database.model.UserEntity class was compiled with an unsupported JDK. Report this error to the EclipseLink open source project.
java.lang.ArrayIndexOutOfBoundsException: Index 8 out of bounds for length 0
[EL Info]: transaction: 2022-01-26 17:43:20.993--ServerSession(422250493)--property eclipselink.jdbc.user is deprecated, property javax.persistence.jdbc.user should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.994--ServerSession(422250493)--property eclipselink.jdbc.driver is deprecated, property javax.persistence.jdbc.driver should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.994--ServerSession(422250493)--property eclipselink.jdbc.url is deprecated, property javax.persistence.jdbc.url should be used instead.
[EL Info]: transaction: 2022-01-26 17:43:20.994--ServerSession(422250493)--property eclipselink.jdbc.password is deprecated, property javax.persistence.jdbc.password should be used instead.
[EL Info]: 2022-01-26 17:43:21.094--ServerSession(422250493)--EclipseLink, version: Eclipse Persistence Services - 2.7.7.v20200504-69f2c2b80d
[EL Warning]: metamodel: 2022-01-26 17:43:21.352--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
Transaction error: Object: database.model.UserEntity@248df8 is not a known Entity type.
Process finished with exit code 0
The problem you mentioned may also be due to using a library which does some kind of code inspection/generation and is not yet ready to work with this very young class file version. Probably eclipselink is the problem here. Try to upgrade to the latest version and if that does not help go back to Java 16 and totally clean and rebuild your project.
See for example this note: UPDATE ECLIPSELINK TO SUPPORT ASM 9.1 FOR JAVA 17