3289109 - CTE - 503 Service Unavailable | Upstream connect error or disconnect/reset before headers. reset reason: overflow

Expense reports do not get imported because the FEEDBACK LOOP sometimes fails with 503 Service Unavailable error.

The message error at transaction code SLG1 for CONCUR_INTEGRATION object:

Import failed for package 1 due to connection errors.
No response from Concur system ZNEW_SAPCONCUR_FEP. Try again later.
503 Service Unavailable
or disconnect/reset before headers. reset reason: overflow

Similar error can be found for the API /financialintegration/fi/v4/companies/transactiontypes/expense/transactions in CTE_DISPLAY_HTTP_LOG: upstream connect error or disconnect/reset before headers. reset reason: overflow.

If you are using a middleware (CPI, PI/PO, iFlow), the following messages might also be found in the middleware logs:

java.util.concurrent.TimeoutException: Request timeout to concur_host_here/ip_address_here after 60000 ms

com.sap.it.rt.adapter.http.api.exception.HttpResponseException: An internal server error occured: AddressIsSetVia.Header: Name or service not known. The MPL ID for the failed message is : AGNsa8fffn2R5MJzYJjmYb_hWENv

NOTE: middleware logs can display generic error messages that are not the actual error returned from Concur, therefore the above errors in middleware are another possible symptom of the actual error "upstream connect error or disconnect/reset before headers. reset reason: overflow".

Read more...

1. Concur Expense
2. Concur Travel
3. SAP ERP
4. SAP ERP integration with SAP Concur solutions
5. SAP S/4HANA
6. SAP S/4HANA integration with SAP Concur solutions

Concur Expense all versions ; Concur Travel all versions ; SAP ERP all versions ; SAP ERP integration with SAP Concur solutions all versions ; SAP S/4HANA all versions ; SAP S/4HANA integration with SAP Concur solutions all versions

503, service unavailable, feedback loop, overflow, Akamai, Concur, ICS, CTE_SETUP, Concur connection, API, expense reports, AddressIsSetVia.Header, Request timeout , KBA , XX-INT-CONCUR , INTEGRATION CONCUR - SAP , BNS-CON-SE-S4 , Concur Suite Enablement S/4HANA Integration , BNS-CON-SE-ERP , Concur ERP Integration , Known Error