CHW-5604 DataSourceManagerUnavailable

data source manager is not wired up; manual refresh cannot be triggered

Default message: data source manager is not wired up; manual refresh cannot be triggered
HTTP status: 503 (server)

Problem. A manual data-source refresh request hit a server with no data-source manager. Cause. The manager subsystem failed to start (or the server was launched in a stripped-down configuration). Fix. Check operator logs for the data-source startup error and restart with a fixed configuration. HTTP 503.