3357093 - Import job failed in SAP Analytics Cloud (SAC) with error message: "The following error message comes from the external data service: status 503 body: Timed out waiting for tunnel to open for tunnelid "

SAC Data import job to S/4HANA On-Premise is getting failed in SAP Analytics Cloud (SAC) with error message: "The following error message comes from the external data service: status 503  body: Timed out waiting for tunnel to open for tunnelid"

• SAP Analytics Cloud 2023.8.14 

1. Log in to SAP Analytics Cloud
2. Create a Connection to Import Data Connection to S/4HANA On-Premise
3. Create a Model
4. Observe Model is created successfully
5. Create new import job whilst selecting no filters for company code
6. Observe job does not complete in sufficient time and results in "503 body:Timed out"
7. Observe in the Payload / Traffic / Gateway trace that the request is still ongoing, but in increments of 10, eg. $skiptoken=100, then $skiptoken=110.

Development team developed a feature to improve this performance, by adding the option to customize batch size which will also be added to S/4HANA Import Data Connection.

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