Wso2 Scim user update with Patch

While trying to update a user through Scim Patch request i get an error and i am not sure what is the issue.

This is the request

curl -v -k --user admin:admin -X PATCH -d '{
        "schemas": ["urn:scim:schemas:core:1.0"],
            "name": {
                    "familyName": "Tester"
                },
          "meta": {
          }
}' --header "Content-Type:application/json" https://localhost:9443/wso2/scim/Users/user-id-here

and this is the error in Wso2

ERROR {org.apache.catalina.core.StandardWrapperValve} -  Servlet.service() for servlet [SCIMServlet] in context with path [/wso2] threw exception
java.lang.RuntimeException: org.apache.cxf.interceptor.Fault
    at org.apache.cxf.interceptor.AbstractFaultChainInitiatorObserver.onMessage(AbstractFaultChainInitiatorObserver.java:116)
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:336)
    at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
    at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:249)
    at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:248)
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:222)
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:153)
    at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:171)
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:289)
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:267)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:120)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:614)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:72)
    at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:91)
    at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:60)
    at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
    at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
    at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57)
    at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
    at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
    at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:159)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958)
    at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1756)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1715)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.cxf.interceptor.Fault
    at org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.java:170)
    at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:136)
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:204)
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:101)
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:94)
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:272)
    ... 42 more
Caused by: java.lang.NullPointerException
    at org.wso2.charon.core.protocol.endpoints.UserResourceEndpoint.updateWithPATCH(UserResourceEndpoint.java:622)
    at org.wso2.carbon.identity.scim.provider.resources.UserResource.updateUserPATCH(UserResource.java:307)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:188)
    at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:104)
    ... 47 more

I did the request as per Scim doc

There is a similar ticket at the Wso2 issue tracker but its consider as fixed.

Not sure what is the issue. Is it a problem in the request or some Wso2 configuration.

Solution

There are three problems in your patch request.

userName attribute is missing. The WSO2 implementation requires you to have userName attribute when doing a PATCH operation on the user.
The "meta" attribute doesn't have a "attributes" sub attribute. This is a spec violation. If you don't have any attributes to remove you can basically omit the meta attribute completely.
Specifying the schema ""urn:scim:schemas:core:1.0" seems to be creating an issue in the WSO2 Identity Server implementation.

The following is a working version of the curl command you have used.

curl -v -k --user admin:admin -X PATCH -d "{
"schemas":[],
"name":{
  "familyName": "Tester"
},
"userName":"indunil",
"meta": {
  "attributes":[]
 }
}"
 --header "Content-Type:application/json" https://localhost:9443/wso2/scim/Users/e9e57b58-3e90-4165-aadc-697a06f1eb9e