SharePoint 2013 workflow : The server was unable to process the request

Here, I received another SharePoint 2013 workflow error.
This time the workflow was not able to send emails and the following error was being shown

Retrying last request. Next attempt scheduled in less than one minute. Details of last request: HTTP Unauthorized to http://sitename/_vti_bin/client.svc/web/lists/getbyid(guid'guid') Correlation Id: id Instance Id: id

Fortunately I came across this post which gave me the answer
http://sharepoint.stackexchange.com/questions/89101/failed-to-retrieve-the-com-class-factory-for-component-with-clsid-sp-sprequest

Solution 1:
In InetMgr, go to advanced settings for Security Token Service Application Pool and change "Load User Profile" to true. Recycle application pool.

Reason 2 and Solution 2 : There could be another reason for this error. The workflow authentication can fail if the user executing the workflow (this will be the user initiating the workflow) is given permission through active directory group and the container for this group is not selected to be synchronised in the active directory connection.

You can test this out by giving the user permissions directly on the site through a SharePoint group and re-trying the workflow again.


Significant ULS Log Entries are given below :

SPApplicationAuthenticationModule: Failed to build cache key for user

The set of claims could not be mapped to a single user identity. Exception Retrieving the COM class factory for component with CLSID {BDEADF26-C265-11D0-BCED-00A0C90AB50F} failed due to the following error: 800703fa Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA). has occured.

The registered mappered failed to resolve to one identity claim. Exception: System.Runtime.InteropServices.COMException (0x800703FA): Retrieving the COM class factory for component with CLSID {BDEADF26-C265-11D0-BCED-00A0C90AB50F} failed due to the following error: 800703fa Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA). at Microsoft.SharePoint.Library.SPRequest..ctor() at Microsoft.SharePoint.SPGlobal.CreateSPRequestAndSetIdentity(SPSite site, String name, Boolean bNotGlobalAdminCode, String strUrl, Boolean bNotAddToContext, Byte[] UserToken, SPAppPrincipalToken appPrincipalToken, String userName, Boolean bIgnoreTokenTimeout, Boolean bAsAnonymous) at Microsoft.SharePoint.SPRequestManager.GetContextRequest(SPRequestAuthenticationMode authenticationMode) at Microsoft.SharePoint.Administration.SPFarm.get_RequestAny() at Microsoft.SharePoint.SPSecurity.GetCurrentUserTokenNoApplicationPrincipalDelegated() at Microsoft.SharePoint.SPSecurity.GetCurrentUserToken() at Microsoft.SharePoint.SPSecurity.EnsureOriginatingUserToken() at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode) at Microsoft.Office.Server.Security.UserProfileIdentityClaimMapper.GetMappedIdentityClaim(Uri context, IEnumerable`1 identityClaims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.GetClaimFromExternalMapper(Uri contextUri, List`1 claims)

STS Call Claims Saml: Problem getting output claims identity. Exception: 'System.Runtime.InteropServices.COMException (0x800703FA): Retrieving the COM class factory for component with CLSID {BDEADF26-C265-11D0-BCED-00A0C90AB50F} failed due to the following error: 800703fa Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA). at Microsoft.SharePoint.Library.SPRequest..ctor() at Microsoft.SharePoint.SPGlobal.CreateSPRequestAndSetIdentity(SPSite site, String name, Boolean bNotGlobalAdminCode, String strUrl, Boolean bNotAddToContext, Byte[] UserToken, SPAppPrincipalToken appPrincipalToken, String userName, Boolean bIgnoreTokenTimeout, Boolean bAsAnonymous) at Microsoft.SharePoint.SPRequestManager.GetContextRequest(SPRequestAuthenticationMode authenticationMode) at Microsoft.SharePoint.Administration.SPFarm.get_RequestAny() at Microsoft.SharePoint.SPSecurity.GetCurrentUserTokenNoApplicationPrincipalDelegated() at Microsoft.SharePoint.SPSecurity.GetCurrentUserToken() at Microsoft.SharePoint.SPSecurity.EnsureOriginatingUserToken() at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode) at Microsoft.Office.Server.Security.UserProfileIdentityClaimMapper.GetMappedIdentityClaim(Uri context, IEnumerable`1 identityClaims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.GetClaimFromExternalMapper(Uri contextUri, List`1 claims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.ResolveUserIdentityClaim(Uri contextUri, ClaimCollection inputClaims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.GetIdentityClaim(Uri contextUri, ClaimCollection inputClaims, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetLogonIdentityClaim(SPRequestInfo requestInfo, IClaimsIdentity inputIdentity, IClaimsIdentity outputIdentity, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.EnsureSharePointClaims(SPRequestInfo requestInfo, IClaimsIdentity outputIdentity, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.AugmentOutputIdentityForRequest(SPRequestInfo requestInfo, IClaimsIdentity outputIdentity) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetOutputClaimsIdentity(IClaimsPrincipal principal, RequestSecurityToken request, Scope scope)'.

STS Call: Failed to issue new security token. Exception: System.Runtime.InteropServices.COMException (0x800703FA): Retrieving the COM class factory for component with CLSID {BDEADF26-C265-11D0-BCED-00A0C90AB50F} failed due to the following error: 800703fa Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA). at Microsoft.SharePoint.Library.SPRequest..ctor() at Microsoft.SharePoint.SPGlobal.CreateSPRequestAndSetIdentity(SPSite site, String name, Boolean bNotGlobalAdminCode, String strUrl, Boolean bNotAddToContext, Byte[] UserToken, SPAppPrincipalToken appPrincipalToken, String userName, Boolean bIgnoreTokenTimeout, Boolean bAsAnonymous) at Microsoft.SharePoint.SPRequestManager.GetContextRequest(SPRequestAuthenticationMode authenticationMode) at Microsoft.SharePoint.Administration.SPFarm.get_RequestAny() at Microsoft.SharePoint.SPSecurity.GetCurrentUserTokenNoApplicationPrincipalDelegated() at Microsoft.SharePoint.SPSecurity.GetCurrentUserToken() at Microsoft.SharePoint.SPSecurity.EnsureOriginatingUserToken() at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode) at Microsoft.Office.Server.Security.UserProfileIdentityClaimMapper.GetMappedIdentityClaim(Uri context, IEnumerable`1 identityClaims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.GetClaimFromExternalMapper(Uri contextUri, List`1 claims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.ResolveUserIdentityClaim(Uri contextUri, ClaimCollection inputClaims) at Microsoft.SharePoint.IdentityModel.SPIdentityClaimMapperOperations.GetIdentityClaim(Uri contextUri, ClaimCollection inputClaims, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetLogonIdentityClaim(SPRequestInfo requestInfo, IClaimsIdentity inputIdentity, IClaimsIdentity outputIdentity, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.EnsureSharePointClaims(SPRequestInfo requestInfo, IClaimsIdentity outputIdentity, SPCallingIdentityType callerType) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.AugmentOutputIdentityForRequest(SPRequestInfo requestInfo, IClaimsIdentity outputIdentity) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetOutputClaimsIdentity(IClaimsPrincipal principal, RequestSecurityToken request, Scope scope) at Microsoft.IdentityModel.SecurityTokenService.SecurityTokenService.Issue(IClaimsPrincipal principal, RequestSecurityToken request) at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.Issue(IClaimsPrincipal principal, RequestSecurityToken request)

SPSecurityContext: Request for security token failed with exception: System.ServiceModel.FaultException: The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs. at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.ReadResponse(Message response) at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst, RequestSecurityTokenResponse& rstr) at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst) at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForContext(Uri context, Boolean bearerToken, SecurityToken onBehalfOf, SecurityToken actAs, SecurityToken delegateTo, SPRequestSecurityTokenProperties properties)

An exception occurred when trying to issue security token: The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs..

SPApplicationAuthenticationModule: Error authenticating request, Error details { Header: {0}, Body: {1} }. Available parameters: 3001000;reason="There has been an error authenticating the request.";category="invalid_client" {"error_description":"The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs."} .

Application error when access /_vti_bin/client.svc, Error=The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs. at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.ReadResponse(Message response) at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst, RequestSecurityTokenResponse& rstr) at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst) at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForContext(Uri context, Boolean bearerToken, SecurityToken onBehalfOf, SecurityToken actAs, SecurityToken delegateTo, SPRequestSecurityTokenProperties properties) at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForApplicationAuthentication(Uri context, SecurityToken onBehalfOf) at Microsoft.SharePoint.IdentityModel.SPApplicationAuthenticationModule.<>c__DisplayClass4.b__3() at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodeToRunElevated secureCode) at Microsoft.SharePoint.IdentityModel.SPApplicationAuthenticationModule.ConstructIClaimsPrincipalAndSetThreadIdentity(HttpApplication httpApplication, HttpContext httpContext, SPFederationAuthenticationModule fam) at Microsoft.SharePoint.IdentityModel.SPApplicationAuthenticationModule.AuthenticateRequest(Object sender, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Workflow suspended error for Reason 2

RequestorId: guid. Details: RequestorId: guid. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ApplicationException: HTTP 401 {"error":{"code":"-2147024891, System.UnauthorizedAccessException","message":{"lang":"en-US","value":"Access denied. You do not have permission to perform this action or access this resource."}}} {"Transfer-Encoding":["chunked"],"X-SharePointHealthScore":["0"],"SPClientServiceRequestDuration":["6"],"SPRequestGuid":["dguid"],"request-id":["ddd1f137-185d-9315-8eb4-456650fc11be"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"Cache-Control":["max-age=0, private"],"WWW-Authenticate":["Negotiate","NTLM"],"X-AspNet-Version":["4.0.30319"],"X-Powered-By":["ASP.NET"],"X-Content-Type-Options":["nosniff"],"X-MS-InvokeApp":["1; RequireReadOnly"],"MicrosoftSharePointTeamServices":["15.0.0.4535"],"Date":["Thu, 10 Sep 2015 00:56:01 GMT"]} at Microsoft.Activities.Hosting.Runtime.Subroutine.SubroutineChild.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)


ULS Logs for Reason 2

Category	Message
Application Authentication	SPApplicationAuthenticationModule: Failed to build cache key for user
Claims Authentication	SPJsonWebSecurityBaseTokenHandler: ValidateActorIsSelfIssuer! Issuer '00000005-0000-0000-c000-000000000000' is not self issuer.
User Profiles	Couldn't find a user using property 'WorkEmail' of value xxxx@xxxx.xx
Claims Authentication	STS Call Claims Saml: Successfully requested oauth claim identity.
Authentication Authorization	OAuth app principal Name=i:0i.t|ms.sp.ext|guid@guid, IsAppOnlyRequest=False, UserIdentityName=0#.w|domain\user, ClaimsCount=16
CSOM	Request does not have SPBasePermissions.UseRemoteAPIs permission. Need to check it when each API is accessed
CSOM	The request does not have required permission to access SP.RequestContext.Current
CSOM	Exception occured in scope Microsoft.SharePoint.SPContext.get_current. Exception=System.UnauthorizedAccessException: Attempted to perform an unauthorized operation.     at Microsoft.SharePoint.Client.ServerStub.CheckRequiredResourceRight(ProxyContext proxyContext, String memberName, ResourceRight right)     at Microsoft.SharePoint.Client.ServerStub.CheckBlockedGetProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.ServerStub.SPContextServerStub.GetStaticProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.ServerStub.GetStaticPropertyWithMonitoredScope(String propertyName, ProxyContext proxyContext)
CSOM	Original error: System.UnauthorizedAccessException: Attempted to perform an unauthorized operation.     at Microsoft.SharePoint.Client.ServerStub.CheckRequiredResourceRight(ProxyContext proxyContext, String memberName, ResourceRight right)     at Microsoft.SharePoint.Client.ServerStub.CheckBlockedGetProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.ServerStub.SPContextServerStub.GetStaticProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.ServerStub.GetStaticPropertyWithMonitoredScope(String propertyName, ProxyContext proxyContext)
Microfeeds	SocialRESTExceptionProcessingHandler.DoServerExceptionProcessing - SharePoint Server Exception [System.UnauthorizedAccessException: Attempted to perform an unauthorized operation.     at Microsoft.SharePoint.Client.ServerStub.CheckRequiredResourceRight(ProxyContext proxyContext, String memberName, ResourceRight right)     at Microsoft.SharePoint.Client.ServerStub.CheckBlockedGetProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.ServerStub.SPContextServerStub.GetStaticProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.ServerStub.GetStaticPropertyWithMonitoredScope(String propertyName, ProxyContext proxyContext)]
Authentication Authorization	Throw UnauthorizedAccessException instead of SPUtilityInternal.Send401 for client.svc request.
CSOM	Original error: System.UnauthorizedAccessException: Attempted to perform an unauthorized operation.     at Microsoft.SharePoint.Client.ServerStub.CheckRequiredResourceRight(ProxyContext proxyContext, String memberName, ResourceRight right)     at Microsoft.SharePoint.Client.ServerStub.CheckBlockedGetProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.ServerStub.SPContextServerStub.GetStaticProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.ServerStub.GetStaticPropertyWithMonitoredScope(String propertyName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPathRoot(Boolean mainRequestPath, EdmParserNode node, Boolean resourceEndpoint, MethodInformation& methodInfo)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPath(Boolean mainRequestPath, String path, String pathForErrorMessage)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.Process()     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.ProcessRequest()
Microfeeds	SocialRESTExceptionProcessingHandler.DoServerExceptionProcessing - SharePoint Server Exception [System.UnauthorizedAccessException: Attempted to perform an unauthorized operation.     at Microsoft.SharePoint.Client.ServerStub.CheckRequiredResourceRight(ProxyContext proxyContext, String memberName, ResourceRight right)     at Microsoft.SharePoint.Client.ServerStub.CheckBlockedGetProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.ServerStub.SPContextServerStub.GetStaticProperty(String propName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.ServerStub.GetStaticPropertyWithMonitoredScope(String propertyName, ProxyContext proxyContext)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPathRoot(Boolean mainRequestPath, EdmParserNode node, Boolean resourceEndpoint, MethodInformation& methodInfo)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPath(Boolean mainRequestPath, String path, String pathForErrorMessage)     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.Process()     at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.ProcessRequest()]
Authentication Authorization	Throw UnauthorizedAccessException instead of SPUtilityInternal.Send401 for client.svc request.