We are seeing the Synchronize Agile Central job shows unexpected warnings:
There was a problem syncing tasks for the CA PPM project <Project Name> HTTP/1.1 520 Origin Error
There was a project syncing CA PPM project: <Project Name> HTTP/1.1 503 Service Unavailable
Release : All Supported
Component : CA PPM SAAS RALLY
This issue is caused by DE58954
This issue was fixed as part of Rally defect DE58954.