default connection ssh works but when you have two ssh servers, you put the each rsa private key in each server and the default key is blank. You test it and you have:
Failed to connect or change directory
jenkins.plugins.publish_over.BapPublisherException: Failed to connect session for config [ora10g@FR-8L3GXW1B]. Message [Auth fail].
You supress Remote Directory. Same bad result.
And you put a default rsa private key and a specific rsa private key : Same bad result