Recovering from a high availability system crash
The Pega Platform provides crash recovery for browser and servers. With crash recovery enabled, the Pega Platform saves the structure of the user interface and relevant work metadata to the database on user interface events.
The following matrix details the events that occur if a browser, Pega Platform server, or machine crashes.
| Events | Browser crash | Pega Platform server crash |
| Pega Platform application user interface is redrawn | Yes | Yes |
| User must re-authenticate |
|
|
| Data entry loss |
| Data not committed is lost |
Additionally, after a crash event, users must:
- Reacquire work object locks.
- Manually reopen assignments.
- Recovering from a server crash
Pega Platform server failover occurs when you have enabled periodic work recording to shared storage and the Pega Platform server that fails is taken out of service from the load balancer.
- Recovering from a browser crash
Browser crash recovery is provided as a part of the Pega Platform. The state of a Pega Platform application is recovered without loss. The clipboard preserves both metadata for the user interface and any data entered on screens and submitted.
- Enabling crash notification
You can configure Pega Platform to display a message to users in the event of a server or browser crash.
- Enabling periodic work recording
To recover from server or browser crashes, you can configure Pega Platform to periodically record work in progress. When configured in this way, the system saves metadata about the state of user interface interactions, tabs, and screens, and restores the UI state to the last persisted state after a crash.
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