Smallrye OpenAPI annotaton scanner throws StackOverflowError when processing JAX-RS resource classes which implement a locator that will return the class itself ---------------------------------------------------------------------------------------------------------------------------------------------------------------- Key: WFLY-13545 URL: https://issues.redhat.com/browse/WFLY-13545 Project: WildFly Issue Type: Bug Components: MP OpenAPI Affects Versions: 20.0.0.Beta1 Reporter: Paul Ferraro Assignee: Paul Ferraro Priority: Major When deploying a WAR which contains a JAX-RS resource class which is declaring a locator that is supposed to return the resource class itself - i.e. {{this}} - the depoyment fails with a {{StackOverflowError}}. The annotation scanner loops until the stack overflow happens because it tries to process the JAX-RS resource class recursively and maybe the process tself should be protected against this case. The following stack trace represents the output of a deployment failure when an attempt to deploy a WAR with such a resource: {code} at org.jboss.logging@3.4.1.Final-redhat-00001//org.jboss.logging.Logger.getLogger(Logger.java:2490) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.dataobject.DataObjectDeque.<init>(DataObjectDeque.java:38) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiDataObjectScanner.<init>(OpenApiDataObjectScanner.java:138) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiDataObjectScanner.process(OpenApiDataObjectScanner.java:163) at io.smallrye.openapi//io.smallrye.openapi.runtime.util.SchemaFactory.typeToSchema(SchemaFactory.java:360) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.createResponseFromJaxRsMethod(OpenApiAnnotationScanner.java:924) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsMethod(OpenApiAnnotationScanner.java:688) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.lambda$processJaxRsResourceClass$0(OpenApiAnnotationScanner.java:422) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsResourceClass(OpenApiAnnotationScanner.java:420) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsSubResource(OpenApiAnnotationScanner.java:511) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsResourceClass(OpenApiAnnotationScanner.java:426) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsSubResource(OpenApiAnnotationScanner.java:511) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsResourceClass(OpenApiAnnotationScanner.java:426) at io.smallrye.openapi//io.smallrye.openapi.runtime.scanner.OpenApiAnnotationScanner.processJaxRsSubResource(OpenApiAnnotationScanner.java:511) ... {code} The failure was initially noticed during RESTEasy tests against EAP XP 1.0.0 CR1 and CR2. The SmallRye OpenAPI versions that I tested this against are 1.1.21 and 1.1.22.