Symptoms

AppSync 4.4 is being used.While running a service plan interactively in the UI, an error is seen: HTTP Failure Error: 401 OK. The Service Plan runs fine.

Cause

The new Keycloak component of AppSync 4.4 has expired a token due to the default timeout.

Resolution

Increase the default keycloak timeout settings in the advanced settings and restart the AppSync Server services.Increase: keycloak.access.token.timeout to 30keycloak.refresh.token.timeout to 60 Navigate to settings, then Advanced settings to adjust the AppSync server settings. 

Support Cases