java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String · Issue #1666

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Already on GitHub? Sign in to your account @Produces(['application/json']) @ApiOperation(value = "My description", httpMethod = "GET" ) @Path("/get") @ApiImplicitParams([ @ApiImplicitParam(name = "myIds", value = "my's ID", required = true, dataType = "integer", paramType = "query", allowMultiple = true, example = "1") def get() { ... }
I'm getting the exception in the title.
Debugging the code I've figured out it comes from PropertyBuilder.java, at step 755
final String value = PropertyId.EXAMPLE.findValue(args);
it expects to retrieve a String, while the function at line 111, is returning a Long (number 1 in the example).
        public <T> T findValue(Map<PropertyId, Object> args) {
            @SuppressWarnings("unchecked")
            final T value = (T) args.get(this);
            return value;
Here the log:
ERROR com.sun.jersey.spi.container.ContainerResponse - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
    at io.swagger.models.properties.PropertyBuilder$Processor.merge(PropertyBuilder.java:755) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder$Processor$10.merge(PropertyBuilder.java:381) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder$Processor.build(PropertyBuilder.java:726) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder.build(PropertyBuilder.java:41) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.util.ParameterProcessor.applyAnnotations(ParameterProcessor.java:102) ~[swagger-core-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.readImplicitParam(Reader.java:437) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.readImplicitParameters(Reader.java:412) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.read(Reader.java:399) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.read(Reader.java:147) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.scan(ApiListingResource.java:68) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.process(ApiListingResource.java:112) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.getListingJson(ApiListingResource.java:154) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.getListing(ApiListingResource.java:141) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_66]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_66]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_66]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_66]
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1426) ~[springloaded-1.2.5.RELEASE.jar:1.2.5.RELEASE]
    at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) [jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) [jersey-server-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) [jersey-servlet-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) [jersey-servlet-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) [jersey-servlet-1.19.jar:1.19]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.jaxrs.web.JaxrsContext$JaxrsServiceImpl.process(JaxrsContext.java:195) [jaxrs-0.12.jar:na]
    at org.jaxrs.web.JaxrsService$process.call(Unknown Source) [jaxrs-0.12.jar:na]
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) [groovy-2.4.5.jar:2.4.5]
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) [groovy-2.4.5.jar:2.4.5]
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133) [groovy-2.4.5.jar:2.4.5]
    at org.grails.jaxrs.JaxrsController.handle(JaxrsController.groovy:45) [jaxrs-0.12.jar:na]
    at org.grails.jaxrs.JaxrsController$$FastClassByCGLIB$$2e467a68.invoke(<generated>) [jaxrs-0.12.jar:na]
    at org.springframework.cglib.reflect.FastMethod.invoke(FastMethod.java:57) [spring-core-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.grails.core.DefaultGrailsControllerClass.invoke(DefaultGrailsControllerClass.java:172) [grails-core-3.1.0.RC1.jar:3.1.0.RC1]
    at org.grails.web.mapping.mvc.UrlMappingsInfoHandlerAdapter.handle(UrlMappingsInfoHandlerAdapter.groovy:87) [grails-web-url-mappings-3.1.0.RC1.jar:3.1.0.RC1]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) [spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969) [spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:860) [spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) [spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:243) [spring-boot-actuator-1.3.1.RELEASE.jar:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111) [spring-boot-actuator-1.3.1.RELEASE.jar:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:73) [grails-web-mvc-3.1.0.RC1.jar:3.1.0.RC1]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.grails.web.filters.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:67) [grails-web-mvc-3.1.0.RC1.jar:3.1.0.RC1]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.jaxrs.web.JaxrsFilter.doFilterInternal(JaxrsFilter.java:52) [jaxrs-0.12.jar:na]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:103) [spring-boot-actuator-1.3.1.RELEASE.jar:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar:4.2.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_66]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_66]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.30.jar:8.0.30]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
ERROR org.grails.web.errors.GrailsExceptionResolver - ClassCastException occurred when processing request: [GET] /myApp/swagger.json
java.lang.Long cannot be cast to java.lang.String. Stacktrace follows:
java.lang.reflect.InvocationTargetException: null
    at org.jaxrs.web.JaxrsFilter.doFilterInternal(JaxrsFilter.java:52) ~[jaxrs-0.12.jar:na]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_66]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_66]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
    at io.swagger.models.properties.PropertyBuilder$Processor.merge(PropertyBuilder.java:755) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder$Processor$10.merge(PropertyBuilder.java:381) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder$Processor.build(PropertyBuilder.java:726) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.models.properties.PropertyBuilder.build(PropertyBuilder.java:41) ~[swagger-models-1.5.7.jar:1.5.7]
    at io.swagger.util.ParameterProcessor.applyAnnotations(ParameterProcessor.java:102) ~[swagger-core-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.readImplicitParam(Reader.java:437) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.readImplicitParameters(Reader.java:412) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.read(Reader.java:399) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.Reader.read(Reader.java:147) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.scan(ApiListingResource.java:68) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.process(ApiListingResource.java:112) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.getListingJson(ApiListingResource.java:154) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at io.swagger.jaxrs.listing.ApiListingResource.getListing(ApiListingResource.java:141) ~[swagger-jaxrs-1.5.7.jar:1.5.7]
    at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) ~[jersey-server-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) ~[jersey-servlet-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) ~[jersey-servlet-1.19.jar:1.19]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) ~[jersey-servlet-1.19.jar:1.19]
    at org.jaxrs.web.JaxrsContext$JaxrsServiceImpl.process(JaxrsContext.java:195) ~[jaxrs-0.12.jar:na]
    ... 4 common frames omitted