[JAVA] [JAX-RS] Server InvalidDefinitionException: Cannot construct instance by using oneOf
Hi Smartbear Community, I have the following swagger.yaml that uses theoneOfkeyword and I used the latest Swagger codegen tools (3.0.22) to create a server stub for JAX-RS Jersey. openapi: 3.0.0 info: version: 0.0.1 title: Polymorphism example description: '' paths: /animal: post: summary: Create a new animal requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/Animal' responses: '201': description: Created components: schemas: Animal: properties: name: type: string props: oneOf: - $ref: '#/components/schemas/Fish' - $ref: '#/components/schemas/Dog' Fish: type: object properties: depth: type: integer Dog: type: object properties: country: type: string I am trying to post the following example object: { "name":"Foo", "props":{ "country":"Bar" } } But this results in the following exception: javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `io.swagger.model.OneOfAnimalProps` (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information at [Source: (org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream); line: 1, column: 30] (through reference chain: io.swagger.model.Animal["props"]) at org.glassfish.jersey.servlet.WebComponent.serviceImpl (WebComponent.java:432) at org.glassfish.jersey.servlet.WebComponent.service (WebComponent.java:370) at org.glassfish.jersey.servlet.ServletContainer.service (ServletContainer.java:389) at org.glassfish.jersey.servlet.ServletContainer.service (ServletContainer.java:342) at org.glassfish.jersey.servlet.ServletContainer.service (ServletContainer.java:229) at org.eclipse.jetty.servlet.ServletHolder.handle (ServletHolder.java:808) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1669) at io.swagger.api.ApiOriginFilter.doFilter (ApiOriginFilter.java:15) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle (ServletHandler.java:585) at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle (SecurityHandler.java:577) at org.eclipse.jetty.server.session.SessionHandler.doHandle (SessionHandler.java:223) at org.eclipse.jetty.server.handler.ContextHandler.doHandle (ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope (ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope (SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope (ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle (ContextHandlerCollection.java:215) at org.eclipse.jetty.server.handler.HandlerCollection.handle (HandlerCollection.java:110) at org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle (Server.java:497) at org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:310) at org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run (AbstractConnection.java:540) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run (QueuedThreadPool.java:555) at java.lang.Thread.run (Thread.java:748) Swagger-codegen version Swagger-codegen version: 3.0.22 Command line used for generation CLI command:java -jar swagger-codegen-cli.jar generate -i openapi.yaml -l jaxrs-jersey -o jaxrs-jersey/ Any advise how to fix this issue is much appreciated!