WSO2 API update REST API throwing exception

Question

I am using REST APIs for creating the APIs in WSO2 API Manager 3.1.0. I have successfully created the API using the POST API. But getting the below exception while updating that API using PUT API

TID: [-1234] [api/am/publisher] [2020-06-30 08:03:21,551] ERROR {org.wso2.carbon.apimgt.rest.api.util.exception.GlobalThrowableMapper} - An unknown exception has been captured by the global exception mapper. java.lang.ClassCastException: class [Ljava.lang.Object; cannot be cast to class [Ljava.lang.String; ([Ljava.lang.Object; and [Ljava.lang.String; are in module java.base of loader 'bootstrap')
        at org.wso2.carbon.apimgt.rest.api.publisher.v1.impl.ApisApiServiceImpl.apisApiIdPut(ApisApiServiceImpl.java:571)
        at org.wso2.carbon.apimgt.rest.api.publisher.v1.ApisApi.apisApiIdPut(ApisApi.java:634)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179)
        at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
        at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:193)
        at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103)
        at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
        at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
        at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
        at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
        at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)
        at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234)
        at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208)
        at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160)
        at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:216)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPut(AbstractHTTPServlet.java:237)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:663)
        at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:86)
        at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:110)
        at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:75)
        at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
        at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:49)
        at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
        at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:145)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:688)
        at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
        at org.wso2.carbon.tomcat.ext.valves.RequestCorrelationIdValve.invoke(RequestCorrelationIdValve.java:119)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:834)

My request and request body is as follows:

https://x.x.x.x:9443/api/am/publisher/v1/apis/09475e94-4b0a-43bb-98e7-6a359efbc7b9

{
    "name": "PostmanAPI",
    "context": "/api",
    "version": "1.0.0",
    "description": "created via Postman",
    "apiThrottlingPolicy": "Unlimited"
}

I am getting the below HTTP response

{
    "code": 500,
    "message": "Internal server error",
    "description": "The server encountered an internal error. Please contact administrator.",
    "moreInfo": "",
    "error": []
}

I am following the below document for learning the REST API provided for API management

https://apim.docs.wso2.com/en/latest/develop/product-apis/publisher-apis/publisher-v1/publisher-v1/#/APIs/put_apis__apiId_

Please let me know why such exception is thrown?

Answer 1

This issue happens if you are using basic authentication when invoking the REST API. Please refer issue [1]. This does not happen if you use OAuth authentication for this. The fix is added to the latest WUM update of API Manager 3.1.0. If you are using the WUM updated packs, you can try in the latest one with basic authentication. Or else you can use OAuth authentication instead, if you are using the 3.1.0 vanilla distribution.

[1] https://github.com/wso2/product-apim/issues/8074