When a service generates log events, it sends them to the Log Manager on the master gateway node. When you have the high availability option and the master gateway node becomes unavailable, the application services send log events to the Log Manager on a new master gateway node.
The Service Manager, the application services, and the Log Manager perform the following tasks:
An application service process writes log events to a Guaranteed Message Delivery file.
The application service process sends the log events to the Service Manager on the gateway node for the domain.
The Log Manager processes the log events and writes log event files. The application service process deletes the temporary file.
If the Log Manager is unavailable, the Guaranteed Message Delivery files stay on the node running the service process. The Service Manager for the node sends the log events in the Guaranteed Message Delivery files when the Log Manager becomes available, and the Log Manager writes log event files.