SAP Knowledge Base Article - Public

3121065 - Occasionally get 401 error when connect to external endpoint - [ Service Event Bus - SEB]


  • When you work on SEB external event integration scenarios, some of the scenarios for the defined subscriptions are not triggered as expected.
  • In the "Event Notification Audit Log" tool of SAP SuccessFactors Admin Center, failed events show an HTTP response "401 null" error reported from the endpoint. 
    Caused by: org.apache.cxf.transport.http.HTTPException: HTTP response '401: null' when communicating with


SAP SuccessFactors HXM Suite


  • We're aware of this issue and are working on resolving it as part of PLS-23600
  • This error can be caused by two reasons:
  1. incorrect configuration in the integration.
  2. the error reported and described in this known issue.


Workaround: Update the token expire time in the OAuth token service for the erroneous subscriptions and extend it to 30 days. Make sure the change takes effect.


KI2111, PLS-23600 , KBA , LOD-SF-PLT-SEB , Service Event Bus Framework , Known Error


SAP SuccessFactors HXM Suite all versions


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