PEGA0127 alert: Service registry recovered from safe mode
The PEGA0127 alert is an information-only message to indicate that the cluster has recovered from a severe problem. The service registry recovers from safe mode by resuming the heartbeat of a node that was previously declared unhealthy. The node rejoins the Pega cluster and resumes the cluster-related activity.
The heartbeat is a process in which each Pega node updates its
last seen time parameter in the service registry database every 30 seconds to indicate that the node is still running and available. The service registry is a mechanism for discovery and coordination of distributed components in a Pega cluster. For more information, see About service registry.
Reason for the alert
PEGA0127 alerts are always preceded by a PEGA0126 alert and one or more PEGA0125 alerts. First, a node fails to update its heartbeat (PEGA0125). If the heartbeat failure occurs several times, the node stops all cluster-related activity and the service registry enters safe mode (PEGA0126). When the root cause behind the heartbeat failure is resolved, for example, database connectivity is restored, the service registry recovers from safe mode and the node rejoins the Pega cluster (PEGA0127).
For more information, see:
- PEGA0125 alert: Service registry heartbeat failed
- PEGA0126 alert: Service registry is entering safe mode
Service registry recovered from safe mode
Logs to recognize alert
In the PegaRULES.log file, the logs relevant to the PEGA0127 alert contain the following entry:
Heartbeat has been restored
No action is required.