Fail to get destination using sap cloud sdk - sap-cloud-sdk

Question

I am using sap cloud sdk to request destination. VCAP_SERVICES is deployed in enviroment in docker. Here is my code to get destination
DestinationOptions options =
DestinationOptions
.builder()
.augmentBuilder(
ScpCfDestinationOptionsAugmenter
.augmenter()
.retrievalStrategy(ScpCfDestinationRetrievalStrategy.SUBSCRIBER_THEN_PROVIDER))
.build();
Try<Destination> destination = DestinationAccessor.getLoader().tryGetDestination(destinationName, options);
Here is the vcap services as env virable in docker:
{
"xsuaa": [
{
"label": "xsuaa",
"provider": null,
"plan": "broker",
"name": "***",
"tags": [
"xsuaa"
],
...
}
],
"destination": [
{
"label": "destination",
"provider": null,
"plan": "lite",
"name": "***",
"tags": [
"destination",
"conn",
"connsvc"
],
...
},
"syslog_drain_url": null,
"volume_mounts": []
}
]
}
Here is cloud sdk version:
implementation("com.sap.cloud.sdk:sdk-bom:3.59.0")
implementation("com.sap.cloud.sdk.cloudplatform:scp-cf:3.59.0")
implementation("com.sap.cds:cds-integration-cloud-sdk:1.21.0")
implementation("com.sap.cloud.sdk.cloudplatform:servlet:3.59.0")
When get destinations, cloud sdk has got client id, client secret, auth token url, zid from VCAP_SERVICES. However, we failed to request access_token. The error is 401 BAD request.
enter image description here
Here is the debug information:| com.sap.cloud.sdk.cloudplatform.cache.CacheRuntimeException: com.sap.cloud.sdk.cloudplatform.connectivity.exception.DestinationAccessException: Failed to get destination. qm_1 | at com.sap.cloud.sdk.cloudplatform.cache.CacheUtil.lambda$wrapCallableAsFunction$0(CacheUtil.java:45) qm_1 | at com.github.benmanes.caffeine.cache.BoundedLocalCache.lambda$doComputeIfAbsent$14(BoundedLocalCache.java:2346) qm_1 | at java.base/java.util.concurrent.ConcurrentHashMap.compute(Unknown Source) qm_1 | at com.github.benmanes.caffeine.cache.BoundedLocalCache.doComputeIfAbsent(BoundedLocalCache.java:2344) qm_1 | at com.github.benmanes.caffeine.cache.BoundedLocalCache.computeIfAbsent(BoundedLocalCache.java:2327) qm_1 | at com.github.benmanes.caffeine.cache.LocalCache.computeIfAbsent(LocalCache.java:108) qm_1 | at com.github.benmanes.caffeine.cache.LocalManualCache.get(LocalManualCache.java:62) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.lambda$tryGetDestination$2ec57ad6$1(ScpCfDestinationLoader.java:117) qm_1 | at io.vavr.control.Try.of(Try.java:75) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.tryGetDestination(ScpCfDestinationLoader.java:116) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.DestinationLoaderChain.tryGetDestination(DestinationLoaderChain.java:84) qm_1 | at com.sap.om.print.service.impl.NotificationServiceImpl.pushNotification(NotificationServiceImpl.java:64) qm_1 | at com.sap.om.print.controller.QueueController.sendNotificationMessage(QueueController.java:197) qm_1 | at com.sap.om.print.controller.QueueController$$FastClassBySpringCGLIB$$c0a3b93.invoke(<generated>) qm_1 | at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) qm_1 | at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779) qm_1 | at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) qm_1 | at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) qm_1 | at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89) qm_1 | at io.github.resilience4j.ratelimiter.RateLimiter.lambda$decorateCheckedSupplier$9076412b$1(RateLimiter.java:218) qm_1 | at io.github.resilience4j.ratelimiter.RateLimiter.executeCheckedSupplier(RateLimiter.java:839) qm_1 | at io.github.resilience4j.ratelimiter.RateLimiter.executeCheckedSupplier(RateLimiter.java:825) qm_1 | at io.github.resilience4j.ratelimiter.configure.RateLimiterAspect.handleJoinPoint(RateLimiterAspect.java:179) qm_1 | at io.github.resilience4j.ratelimiter.configure.RateLimiterAspect.proceed(RateLimiterAspect.java:142) qm_1 | at io.github.resilience4j.ratelimiter.configure.RateLimiterAspect.rateLimiterAroundAdvice(RateLimiterAspect.java:119) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/java.lang.reflect.Method.invoke(Unknown Source) qm_1 | at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634) qm_1 | at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:624) qm_1 | at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:72) qm_1 | at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) qm_1 | at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) qm_1 | at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89) qm_1 | at io.github.resilience4j.circuitbreaker.CircuitBreaker.lambda$decorateCheckedSupplier$82a9021a$1(CircuitBreaker.java:73) qm_1 | at io.github.resilience4j.circuitbreaker.CircuitBreaker.executeCheckedSupplier(CircuitBreaker.java:834) qm_1 | at io.github.resilience4j.circuitbreaker.configure.CircuitBreakerAspect.defaultHandling(CircuitBreakerAspect.java:188) qm_1 | at io.github.resilience4j.circuitbreaker.configure.CircuitBreakerAspect.proceed(CircuitBreakerAspect.java:135) qm_1 | at io.github.resilience4j.circuitbreaker.configure.CircuitBreakerAspect.circuitBreakerAroundAdvice(CircuitBreakerAspect.java:112) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/java.lang.reflect.Method.invoke(Unknown Source) qm_1 | at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634) qm_1 | at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:624) qm_1 | at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:72) qm_1 | at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) qm_1 | at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) qm_1 | at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) qm_1 | at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) qm_1 | at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) qm_1 | at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) qm_1 | at com.sap.om.print.controller.QueueController$$EnhancerBySpringCGLIB$$54eb5301.sendNotificationMessage(<generated>) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) qm_1 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) qm_1 | at java.base/java.lang.reflect.Method.invoke(Unknown Source) qm_1 | at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) qm_1 | at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) qm_1 | at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) qm_1 | at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) qm_1 | at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) qm_1 | at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) qm_1 | at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1060) qm_1 | at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) qm_1 | at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) qm_1 | at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) qm_1 | at javax.servlet.http.HttpServlet.service(HttpServlet.java:497) qm_1 | at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) qm_1 | at javax.servlet.http.HttpServlet.service(HttpServlet.java:584) qm_1 | at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74) qm_1 | at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129) qm_1 | at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93) qm_1 | at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) qm_1 | at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) qm_1 | at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) qm_1 | at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) qm_1 | at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) qm_1 | at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) qm_1 | at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) qm_1 | at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84) qm_1 | at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) qm_1 | at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68) qm_1 | at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) qm_1 | at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68) qm_1 | at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117) qm_1 | at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) qm_1 | at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) qm_1 | at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) qm_1 | at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) qm_1 | at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) qm_1 | at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) qm_1 | at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) qm_1 | at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) qm_1 | at io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52) qm_1 | at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130) qm_1 | at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) qm_1 | at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78) qm_1 | at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99) qm_1 | at io.undertow.server.Connectors.executeRootHandler(Connectors.java:387) qm_1 | at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:841) qm_1 | at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) qm_1 | at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2019) qm_1 | at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1558) qm_1 | at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1449) qm_1 | at java.base/java.lang.Thread.run(Unknown Source) qm_1 | Caused by: com.sap.cloud.sdk.cloudplatform.connectivity.exception.DestinationAccessException: Failed to get destination. qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationServiceAdapter.getDestinationConfigurationAsJson(ScpCfDestinationServiceAdapter.java:269) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.getDestinationConfigurationFromDestinationService(ScpCfDestinationLoader.java:263) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.getDestinationConfigurationByTenant(ScpCfDestinationLoader.java:203) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.getDestinationConfigurationByRetrievalStrategy(ScpCfDestinationLoader.java:160) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.loadAndParseDestination(ScpCfDestinationLoader.java:138) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationLoader.lambda$null$0(ScpCfDestinationLoader.java:119) qm_1 | at com.sap.cloud.sdk.cloudplatform.cache.CacheUtil.lambda$wrapCallableAsFunction$0(CacheUtil.java:42) qm_1 | ... 112 common frames omitted qm_1 | Caused by: com.sap.cloud.sdk.cloudplatform.resilience.ResilienceRuntimeException: com.sap.cloud.sdk.cloudplatform.thread.exception.ThreadContextExecutionException: com.sap.cloud.sdk.cloudplatform.security.exception.TokenRequestFailedException: Failed to resolve access token. qm_1 | at com.sap.cloud.sdk.frameworks.resilience4j.Resilience4jDecorationStrategy.lambda$null$3(Resilience4jDecorationStrategy.java:233) qm_1 | at io.vavr.control.Try.onFailure(Try.java:659) qm_1 | at com.sap.cloud.sdk.frameworks.resilience4j.Resilience4jDecorationStrategy.lambda$decorateCallable$4(Resilience4jDecorationStrategy.java:232) qm_1 | at com.sap.cloud.sdk.cloudplatform.resilience.ResilienceDecorationStrategy.executeCallable(ResilienceDecorationStrategy.java:261) qm_1 | at com.sap.cloud.sdk.cloudplatform.resilience.ResilienceDecorator.executeCallable(ResilienceDecorator.java:250) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationServiceAdapter.getDestinationConfigurationAsJson(ScpCfDestinationServiceAdapter.java:256) qm_1 | ... 118 common frames omitted qm_1 | Caused by: com.sap.cloud.sdk.cloudplatform.thread.exception.ThreadContextExecutionException: com.sap.cloud.sdk.cloudplatform.security.exception.TokenRequestFailedException: Failed to resolve access token. qm_1 | at com.sap.cloud.sdk.cloudplatform.thread.AbstractThreadContextExecutor.execute(AbstractThreadContextExecutor.java:299) qm_1 | at com.sap.cloud.sdk.frameworks.resilience4j.DefaultThreadContextProvider.lambda$decorateCallable$0(DefaultThreadContextProvider.java:26) qm_1 | at java.base/java.util.concurrent.FutureTask.run(Unknown Source) qm_1 | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) qm_1 | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) qm_1 | ... 1 common frames omitted qm_1 | Caused by: com.sap.cloud.sdk.cloudplatform.security.exception.TokenRequestFailedException: Failed to resolve access token. qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.XsuaaService.lambda$retrieveAccessTokenViaClientCredentialsGrant$2(XsuaaService.java:92) qm_1 | at io.vavr.control.Try.getOrElseThrow(Try.java:748) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.XsuaaService.retrieveAccessTokenViaClientCredentialsGrant(XsuaaService.java:91) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationServiceAdapter.getAccessTokenForDestinationService(ScpCfDestinationServiceAdapter.java:288) qm_1 | at com.sap.cloud.sdk.cloudplatform.connectivity.ScpCfDestinationServiceAdapter.lambda$getDestinationConfigurationAsJson$0(ScpCfDestinationServiceAdapter.java:258) qm_1 | at com.sap.cloud.sdk.frameworks.resilience4j.Resilience4jDecorationStrategy.lambda$decorateCallable$2(Resilience4jDecorationStrategy.java:212) qm_1 | at com.sap.cloud.sdk.cloudplatform.security.SecurityContextThreadContextDecorator.lambda$decorateCallable$2(SecurityContextThreadContextDecorator.java:51) qm_1 | at com.sap.cloud.sdk.cloudplatform.thread.ThreadContextCallable.call(ThreadContextCallable.java:225) qm_1 | at com.sap.cloud.sdk.cloudplatform.thread.AbstractThreadContextExecutor.execute(AbstractThreadContextExecutor.java:293) qm_1 | ... 5 common frames omitted qm_1 | Caused by: com.sap.cloud.security.xsuaa.tokenflows.TokenFlowException: Error requesting technical user token with grant_type 'client_credentials': Error retrieving JWT token. Server URI https://***.authentication.sap.hana.ondemand.com/oauth/token. Http status code 401. Response body '{"error":"unauthorized","error_description":"Bad credentials"}' qm_1 | at com.sap.cloud.security.xsuaa.tokenflows.ClientCredentialsTokenFlow.requestTechnicalUserToken(ClientCredentialsTokenFlow.java:188) qm_1 | at com.sap.cloud.security.xsuaa.tokenflows.ClientCredentialsTokenFlow.execute(ClientCredentialsTokenFlow.java:141) qm_1 | at io.vavr.control.Try.of(Try.java:75) qm_1 | ... 12 common frames omitted qm_1 | Caused by: com.sap.cloud.security.xsuaa.client.OAuth2ServiceException: Error retrieving JWT token. Server URI https://****.authentication.sap.hana.ondemand.com/oauth/token. Http status code 401. Response body '{"error":"unauthorized","error_description":"Bad credentials"}' qm_1 | at com.sap.cloud.security.xsuaa.client.OAuth2ServiceException$Builder.build(OAuth2ServiceException.java:107) qm_1 | at com.sap.cloud.security.xsuaa.client.DefaultOAuth2TokenService.executeRequest(DefaultOAuth2TokenService.java:98) qm_1 | at com.sap.cloud.security.xsuaa.client.DefaultOAuth2TokenService.requestAccessToken(DefaultOAuth2TokenService.java:80) qm_1 | at com.sap.cloud.security.xsuaa.client.AbstractOAuth2TokenService.getAndCacheToken(AbstractOAuth2TokenService.java:305) qm_1 | at com.sap.cloud.security.xsuaa.client.AbstractOAuth2TokenService.getOrRequestAccessToken(AbstractOAuth2TokenService.java:263) qm_1 | at com.sap.cloud.security.xsuaa.client.AbstractOAuth2TokenService.getOAuth2TokenResponse(AbstractOAuth2TokenService.java:252) qm_1 | at com.sap.cloud.security.xsuaa.client.AbstractOAuth2TokenService.retrieveAccessTokenViaClientCredentialsGrant(AbstractOAuth2TokenService.java:112) qm_1 | at com.sap.cloud.security.xsuaa.tokenflows.ClientCredentialsTokenFlow.requestTechnicalUserToken(ClientCredentialsTokenFlow.java:183) qm_1 | ... 14 common frames omitted
I debug into cloud sdk: It seems that when forming a post request, the 'Authorization' header will not be added.
HttpHeaders headers = HttpHeadersFactory.createWithoutAuthorizationHeader().withHeader(HttpHeaders.X_ZID,
zoneId);
if (isCacheDisabled() || disableCacheForRequest) {
return requestAccessToken(tokenEndpoint, headers, parameters);
}
Don't know why Authorization header will not be added. But this is the reason that I fail to get a token! Or is there any configuration I missed?
Hope someone can help me with this issue. Thanks.

Answer 1

Please use the "credentials" from the "destination" service binding JSON to run the REST request yourself manually, in order to make sure the binding data is still valid:
Run POST [credentials.url]/oauth/token with Content-Type: application/x-www-form-urlencoded using the following form values:
grant_type: client_credentials
client_id: [credentials.clientid]
client_secret: [credentials.clientsecret]
When successful, you'll receive a 200 response with Content-Type: application/json containing an access_token field.
When not successful, please unbind/rebind the service. The values may have become outdated. Repeat test procedure.