swagger-core

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When I use serialization of io.swagger.v3.oas.models.OpenAPI I got following exception in the log (28 times), it looks as though it does not impact on generated JSON file.

(!) JDK 18 (!) pom dependency:

<dependency>
            <groupId>io.swagger.core.v3</groupId>
            <artifactId>swagger-core</artifactId>
            <version>2.2.2</version>
</dependency>

(i) full warning message in log is below

WARNING: Disabling Afterburner serialization for class io.swagger.v3.oas.models.media.Schema (field #1; mutator com.fasterxml.jackson.module.afterburner.ser.ObjectFieldPropertyWriter), due to access error (type java.lang.IllegalAccessError, message=class io.swagger.v3.oas.models.media.Schema$Access4JacksonSerializer233a439c tried to access protected field io.swagger.v3.oas.models.media.Schema._enum (io.swagger.v3.oas.models.media.Schema$Access4JacksonSerializer233a439c is in unnamed module of loader com.fasterxml.jackson.module.afterburner.util.MyClassLoader @202f054f; io.swagger.v3.oas.models.media.Schema is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @64aad809))

java.lang.IllegalAccessError: class io.swagger.v3.oas.models.media.Schema$Access4JacksonSerializer233a439c tried to access protected field io.swagger.v3.oas.models.media.Schema._enum (io.swagger.v3.oas.models.media.Schema$Access4JacksonSerializer233a439c is in unnamed module of loader com.fasterxml.jackson.module.afterburner.util.MyClassLoader @202f054f; io.swagger.v3.oas.models.media.Schema is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @64aad809)
        at io.swagger.v3.oas.models.media.Schema$Access4JacksonSerializer233a439c.objectField(io/swagger/v3/oas/models/media/Schema$Access4JacksonSerializer.java)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectFieldPropertyWriter.serializeAsField(ObjectFieldPropertyWriter.java:45)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:869)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:760)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:869)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:760)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:869)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:760)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
        at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
        at com.fasterxml.jackson.module.afterburner.ser.ObjectMethodPropertyWriter.serializeAsField(ObjectMethodPropertyWriter.java:87)
        at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
        at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
        at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
        at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
        at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4568)
        at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3821)
        at oap.json.Binder.marshal(Binder.java:288)
        at oap.json.Binder.marshal(Binder.java:281)
        at oap.openapi.maven.OpenApiGeneratorPlugin.execute(OpenApiGeneratorPlugin.java:106)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
        at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:301)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:211)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:165)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:157)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:121)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:127)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:294)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:960)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:293)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:196)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:577)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)

code snippet FYI

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule( new AfterburnerModule() );
mapper.setVisibility( PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY );

String json = mapper.writeValueAsString( (OpenAPI) object );

removing any of mapper settings (module or visibility) or changing visibility to PUBLIC leads to disappearing errors from logs.