MP Quickstart fails to run with JDK 17

[barchetta]

Environment Details

• Helidon Version: 2.3.0
• Helidon MP
• JDK version: build 17-ea+24-2164
• OS: MacOS

---

Problem Description

The Helidon MP quickstart fails to run using JDK 17:

2021.06.02 09:28:50 INFO org.jboss.weld.Event Thread[main,5,main]: WELD-000411: Observer method [BackedAnnotatedMethod] public org.glassfish.jersey.ext.cdi1x.internal.ProcessAllAnnotatedTypes.processAnnotatedType(@Observes ProcessAnnotatedType<?>, BeanManager) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.025 s <<< FAILURE! - in io.helidon.examples.quickstart.mp.MainTest
[ERROR] io.helidon.examples.quickstart.mp.MainTest  Time elapsed: 1.025 s  <<< ERROR!
java.lang.reflect.GenericSignatureFormatError:
Signature Parse error: Expected Field Type Signature
	Remaining input: org.eclipse.microprofile.openapi.annotations.enums.SchemaType
	at io.helidon.examples.quickstart.mp.MainTest.startTheServer(MainTest.java:27)

Steps to reproduce

1. Install JDK 17 preview and make sure you are using it: java --version
2. Generate a project using the 2.3.0 Helidon MP quickstart
3. mvn clean install

[barchetta]

This is due to a Weld issue. See https://issues.redhat.com/browse/WELD-2671

[barchetta]

Workaround

Force upgrade jboss-classfilewriter to 1.2.5 by adding the following to your application's pom.xml:

    <properties>
        <version.lib.jboss.classfilewriter>1.2.5.Final</version.lib.jboss.classfilewriter>
    </properties>

Note using the property only works if you are using the Helidon application parent pom (which the quickstart does). Otherwise you will need to force the upgrade by managing the version yourself in your pom.