2122397 - "com.jcraft.jsch.JSchException: Auth fail" error in SFTP adapter

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental

You would like to connect to one SFTP server using the SFTP adapter in PI or Cloud Integration but it fails with the following exception:

com.jcraft.jsch.JSchException: Auth fail

The audit log in PI shows this error message:

The Cloud Integration WEB UI connectivity test shows the error message below:

• SAP NetWeaver

• SAP Process Integration
• SAP Cloud Integration

PI SFTP PGP ADDON, CPI, SFTP, Password, Private key, SSH, JSchException, Auth fail, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.4, PI 7.4, PO 7.4, Process Orchestration 7.5, PI 7.5, PO 7.5, XI, AEX, HCI, Cloud, Integration, Delivery, message, application, connection SFTP_http://sap.com/xi.XI/SFTP failed, com.sap.engine.interfaces.messaging.api.exception.MessagingException, javax.resource.ResourceException, [GENERIC], [EXCEPTION] , KBA , hci , BC-XI-CON-SFT , Secure File Transfer Protocol Adapter , LOD-HCI-PI-RT , Integration Runtime , Problem